Lyle & Scott
Shopify wasn't the problem. The architecture beneath it was.
Client
Lyle & Scott
Sector
Fashion / Heritage Apparel
Challenge
Accumulated technical debt and third-party dependencies creating operational drag and blocking growth capabilities
Solution
Middleware replacement, Shopify architecture reset, Order Editing enablement, multi-market consolidation, retainer-led delivery model
Outcome
A streamlined, self-serve capable platform with the operational foundations to move faster and a retainer model to keep improving it
The Inflection point
Lyle & Scott have been making clothing since 1874. The golden eagle on the chest is one of the most recognised marks in British fashion, earned through decades of quality, worn by icons, and now being carried into a new era by a brand that has deliberately shed its old identity in favour of something sharper and more contemporary.
By the time they came to Underwaterpistol, Lyle & Scott were in a period of genuine transformation. New leadership. A conscious move away from their terracewear heritage towards a brand with broader appeal. A growing focus on collaborations, limited-edition drops, and the kind of product storytelling that drives direct-to-consumer engagement.
They had the brand momentum. What they didn't have was a technical foundation that could support it.
The Shopify infrastructure they were operating on had been built years earlier, under a different set of assumptions about how Shopify would evolve. Those assumptions proved wrong. The platform had moved in one direction while Lyle & Scott's implementation had gone in another. Over time, the gap between the two had become an operational problem that touched everything, from how long it took to make front-end changes, to what was and wasn't possible at checkout.
Separately, their middleware setup was expensive, inflexible, and limiting what the business could achieve. Priority delivery. Click and collect. Order editing. Each one dependent on resolving the middleware challenge first.
The inflection point wasn't a crisis. It was the point at which the cost of continuing, in time, money, and missed opportunity, became clearly higher than the cost of properly resetting the foundations.
They'd just had their best trading year. The business was in good shape. But the infrastructure was quietly making everything harder than it needed to be, and the longer they left it, the more expensive the fix would become.
The Enemy: An Architecture Built on Outdated Assumptions
Technical debt is easy to accumulate and expensive to remove.
At Lyle & Scott, it had built up across two critical areas: the Shopify theme architecture and the integration layer.
Individually, each created friction. Together, they were slowing the business down.
A theme architecture that had diverged from Shopify's direction
The existing storefront had been built on a framework that made sense at the time, but had become increasingly misaligned with the direction of Shopify. Every new feature had to be built twice, once in the legacy framework and once in the way Shopify now expected stores to operate.
The result was that work that should have been straightforward took significantly longer, cost more, and the gap was widening with every sprint.
Native Shopify capabilities including ai tools and modern liquid functionality, were either unavailable or unreliable in the existing setup. The team was working harder to achieve less, and the divergence was accelerating.
An integration architecture that had become a constraint
The integration layer connecting Shopify to the wider operational stack had evolved over time into a complex dependency within the broader architecture.
Any change that touched the integration layer required additional planning, coordination, and commercial approval outside of the standard delivery process. Changes that should have been routine became projects. Features that depended on integration work, including order editing, delivery options, and improvements to the returns experience, remained on the roadmap because delivering them required navigating multiple layers of complexity.
The operational impact was significant.
Capabilities such as priority delivery and click and collect remained out of reach, not because the business lacked the ambition to introduce them, but because the architecture made implementation difficult. Features customers would reasonably expect from a brand of this scale were harder to deliver than they should have been.
Multiple markets adding operational overhead
Lyle & Scott were operating across five separate Shopify stores, a structure that made sense at an earlier stage of the business but had become a source of ongoing operational friction.
Every price update, banner change and seasonal campaign had to be replicated five times. With the maturity of Shopify Markets, consolidation into a single store had become a realistic option. But achieving that required the underlying architecture to be addressed first.
Retainer hours spent on the wrong work
Perhaps the most commercially significant issue was the impact on the retainer.
Development time that should have been spent driving meaningful improvements in functionality, performance and conversion was instead being consumed by the overhead of maintaining legacy architecture and managing middleware complexity.
The retainer was absorbing friction rather than creating progress.
The Decision: Reset the Architecture Before It Gets Worse
A full redesign would have been the obvious move.
It also would have solved the wrong problem.
Rather than embarking on a large-scale project that would take months, introduce significant scope creep, and ultimately launch into a business that had already evolved, the approach was a structured reset. The existing design would be ported onto a modern, Shopify-native architecture while eliminating the technical debt beneath it.
The customer experience would remain familiar. The foundation would be fundamentally different.
The logic was straightforward. Large rebuilds are high-cost, high-risk initiatives that often deliver less value than expected because priorities change before they launch. A reset, done properly, creates the platform from which every future improvement becomes easier, faster, and more commercially effective.
Future enhancements could then be delivered through the ongoing retainer rather than as separate projects carrying their own cost and overhead. At the same time, redesigning the middleware layer removed a structural dependency that had been limiting what the business could achieve for years.
The cost saving was meaningful, with a significant monthly overhead removed. More importantly, it removed a key bottleneck. Integration work could now be delivered as part of the day-to-day retainer, allowing the business to move faster and bring new capabilities to market more efficiently.
The real decision wasn’t whether to rebuild. It was whether to keep paying the cost of complexity, or remove it.
The answer was clear.
What we built
Middleware replacement
Replacing the middleware was the first and most consequential piece of work. Underwaterpistol built and now manages Lyle & Scott's middleware layer directly, handling the integrations between Shopify and the wider operational stack, including fulfilment, returns, and the brand's resale channel partners.
The commercial impact was immediate. A significant monthly cost was removed. More importantly, integration changes that previously required a separate statement of work and external approval can now be handled within the retainer. The operational bottleneck that had been blocking capabilities for years was gone.
Order editing enablement
Order Editing was one of the capabilities that had been sitting on the roadmap and it's now live. The significance of order editing goes beyond customer convenience. It directly enables the kind of upsell and post-purchase engagement that Lyle & Scott's loyalty and retention strategy depends on. In just 39 days, Lyle & Scott customers made 1,543 self-service edits across 641 orders - the equivalent of 18.2 days of customer service time saved. Address corrections were the dominant use case, accounting for over a quarter of all edits.
Alongside deflecting support contacts, Order Editing generated a £1.03 return per edited order, demonstrating that post-purchase is a viable revenue channel as well as a cost-saving one.
Multi-market consolidation via Shopify Markets
Five separate Shopify stores were consolidated into one. Every price update, banner change, seasonal campaign and product amendment that had previously been repeated across multiple environments now happens once.
The operational savings are significant. Teams spend less time managing complexity and more time focusing on growth.
The move also creates a far cleaner foundation for future market expansion.
Resale channel integration
Lyle & Scott sell through a network of resale and outlet partners that syndicate product feeds, process orders through their own channels, and route fulfilment back through Shopify.
The challenge came when customers needed to make a return. Orders placed through partner channels sat outside Shopify’s native order structure, creating friction within the returns process and leaving customers caught between disconnected systems.
Underwaterpistol worked with AfterShip to solve the problem, building a custom integration that allows partner order numbers to be recognised within Shopify’s returns flow.
The result is a seamless returns experience, regardless of where the original order was placed.
Storefront architecture reset
The rebuild of the Lyle & Scott storefront is in progress, a deliberate reset of the theme architecture onto a modern, Shopify-native framework that preserves the existing customer experience while eliminating the technical debt beneath it.
The goal is not a new look. It is a modern platform.
One where front-end changes that currently require double the effort take the time they should. Where new features can be built once, built properly, and maintained without unnecessary overhead. Where the business can take advantage of Shopify’s ongoing innovation without being constrained by legacy architecture.
When complete, the reset will fundamentally change what the retainer can deliver, shifting time away from managing complexity and towards building capability.
Retainer model: building for ROI
Underpinning all of this is a deliberate shift in how the retainer is structured and deployed.
The objective is for Lyle & Scott’s internal team to handle routine front-end changes themselves using Shopify’s native tools and a modern architecture. Retainer hours can then be focused on the work that creates the greatest value: custom development, integrations, operational improvements, and the complex technical challenges that require specialist Shopify expertise.
This is a different kind of agency relationship.
Rather than billing time for changes a client could make themselves, the focus is on ensuring every hour invested delivers meaningful commercial or operational return.
The outcome
The work delivered over the past eighteen months at Lyle & Scott is largely invisible to the outside world.
The storefront looks much the same. But the complexity sitting beneath it is dramatically reduced, and the business is now able to move faster as a result.
The outcomes that matter here:
‣ A significant middleware cost has been eliminated, with integration work now delivered through the retainer rather than a separate external provider.
‣ Order editing is live unlocking post-purchase capability that had been on the roadmap for years.
‣ Five Shopify stores have been consolidated into a single environment, reducing operational overhead across merchandising, e-commerce, and marketing.
‣ The resale channel returns journey has been resolved, allowing customers to process returns regardless of where an order was placed, without manual intervention from the customer service team.
‣ The storefront architecture reset will remove the double-build overhead that has been consuming development time and slowing delivery.
‣ Priority delivery, click and collect, and locker drop-off are now in development, made possible by the new middleware and integration foundations.
“Stock is more accurate, cancellations are down, and post-purchase changes are far easier for both customers and our team.”
Ivonne Waldo
eCommerce Lead
The most important work in a Shopify reset isn’t always visible on the front end. It’s removing the constraints that have been quietly limiting progress and creating the conditions for faster, more effective execution.
Lyle & Scott’s best trading year came while the technical debt was still in place.
The work since has been about ensuring the technology can support the ambitions of the business, without the overhead, bottlenecks, and costs that had accumulated over time.
Because the challenge was never growth. It was making sure the infrastructure could keep up with it.
what this tells us
Lyle & Scott is a good illustration of something we see frequently with brands that have been on Shopify for several years. The platform has evolved significantly, and so has the way Shopify expects stores to be built. Implementations created under older assumptions can quietly accumulate a kind of drag that is difficult to spot in any single sprint, but very visible over time through higher development costs, missed capabilities, and retainer hours spent maintaining complexity rather than driving progress.
The decision point isn’t always obvious. A brand can be performing well and still be carrying technical debt that limits what comes next. The question isn’t whether the current setup is working. It’s whether it’s the right setup for the next stage of growth. And if it isn’t, the longer the problem is left unresolved, the more expensive it becomes to fix.
This project also highlights the value of simplification. Not simplification for its own sake, but the deliberate removal of unnecessary complexity. Fewer systems. Fewer dependencies. Fewer points of failure. An integration layer that can be evolved within the retainer rather than requiring a separate commercial conversation every time the business wants to make a change.
For a business with the scale and complexity of Lyle & Scott, that matters. Getting to a point where new ideas, improvements, and operational changes can be delivered quickly and efficiently isn’t just an operational win. It’s what allows the business to keep moving forward without technology becoming the thing that holds it back.
Technology
Shopify Plus
Algolia
Order Editing
Aftership
Signifyd
Klaviyo
Services
Shopify Plus build & migration
ERP integration
UX / UI design
SEO & Data migration
Performance & accessibility
Has your Shopify implementation kept pace with your business?
If your retainer is going to maintenance rather than momentum, the architecture is probably the reason.
Not every growth problem needs a rebuild.
Sometimes the biggest opportunity is understanding what’s really holding the business back.
Our senior consultancy sessions are designed to help eCommerce teams identify technical, operational, and architectural constraints before investing time and budget in the wrong solution.