Marketing Agency London:
An Ecommerce Agency for UK Brands
Not a generalist marketing agency London businesses hire for brand awareness. We’re an ecommerce agency in London that Shopify brands like Monster Piercing work with on technical SEO, email marketing, and sales campaign strategy. If you run a Shopify store in London or anywhere in the UK and want a team that already understands your market, this is a good place to start.
Search “marketing agency London,” and you’ll get hundreds of results, most of them generalists who’ll run your social media, your brand campaigns, whatever you need. Webrex Studio isn’t that. We’re an e-commerce agency London merchants can verify, working with 300+ Shopify stores worldwide, and one of our longest-running partnerships is with a UK brand: Monster Piercing. Every figure on this page comes from a published case study, not a sales pitch.
Most of the online marketing agencies UK businesses come across are built to cover every channel a little. We do the opposite: SEO, email, and sales campaigns, specifically for Shopify stores, done deep instead of wide. That’s different from a typical digital marketing agency London brands might already be paying for and not seeing results from.
We’ve rebuilt a broken technical SEO foundation, moved a store off an expensive email platform and grown sales doing it, and run sale campaigns with real, tracked revenue behind them. That’s not theory. It’s the exact work behind the numbers below.
If you run a Shopify store in London, or anywhere in the UK, and you’re comparing ecommerce agencies London has to offer, this page exists so you can check the receipts before you book a call.
Marketing agency London brands trust for real ecommerce growth
What we did for a London brand
Monster Piercing is a UK Shopify store selling piercing and body jewellery.
| Area | What we did | Result |
|---|---|---|
| Technical SEO | Cleaned 7M+ junk URLs from Google’s crawl budget, rebuilt schema, and rewrote collection content around real UK search queries | +50% organic clicks, +43% impressions, average position improved from 6.6 to 5.2 in 90 days |
| Organic growth | Ongoing SEO work across the store | Organic clicks grew from 8K to 28K a month |
| Email marketing | Migrated off Klaviyo to Shopify Email | Sales lifted 335%, and the monthly email bill dropped by $6,600 |
| Spring sale campaign | Full campaign build, offer and email strategy | £23,800 in revenue over 14 days |
| Summer sale campaign | Campaign strategy and execution | Monthly revenue grew 23%, from £40K to £50K |
| Store design | Rebuilt the store’s design across every customer touchpoint | Consistent brand experience site-wide |
What we bring to London brands
SEO & traffic growth
Technical SEO and content work, the same approach that took Monster Piercing’s organic clicks from 8K to 28K a month.
Conversion & store development
CRO, custom Shopify development and UI/UX design, including the full store rebuild we did for Monster Piercing.
Retention & email
Email marketing automation and platform migration, the same programme that lifted Monster Piercing’s sales 335% after moving off Klaviyo.
Sales campaigns that convert
Full campaign builds with tracked revenue, not just “we sent some emails.” Monster Piercing’s spring and summer campaigns are proof.
Why London brands work with us
We’ve already fixed a broken SEO foundation
Monster Piercing’s crawl budget was being wasted on millions of junk URLs before we touched it. If your store has similar technical debt, we’ve solved this exact problem before.
We don’t just email; we prove it works
The Klaviyo migration wasn’t a guess; it’s a documented 335% sales lift with the cost savings attached. We measure every campaign the same way.
Shopify Plus depth
We run nine of our own apps on the Shopify App Store, used by 300,000+ merchants, so the tooling behind SEO, speed, and email is something we build ourselves, not just install.
We show our numbers
Every figure on this page is from a published case study. You can read the source data yourself before you book a call.
Most email marketing agencies talk about open rates. Monster Piercing needed something more basic first: their email platform cost too much and don’t convert well enough. We moved them off Klaviyo onto Shopify Email, rebuilt the flows and campaigns around it, and sales went up 335% while the monthly bill dropped by $6,600.
That’s the kind of work a proper email marketing agency London brands hire should be doing, not just prettier newsletters, but a platform and strategy that actually pays for itself. The same programme also ran two standalone sale campaigns with tracked results: £23,800 in 14 days for a spring sale, and a 23% jump in monthly revenue (£40K to £50K) for a summer sale.
If your email programme costs more than it earns, or you’re not sure what it’s actually doing for revenue, this is the part of our work with Monster Piercing worth asking about.
Email marketing agency: London brands actually need
A lot of SEO work is hard to verify. This isn’t. Every number in Monster Piercing’s SEO turnaround- clicks, impressions, average position- comes straight from Google Search Console, not an internal report we wrote ourselves.
We cleaned out over 7 million junk URLs that were eating their crawl budget, fixed conflicting schema markup, and rebuilt collection page content around what UK piercing and jewellery buyers actually search for. In 90 days: organic clicks up 50%, impressions up 43%, and average ranking position improved from 6.6 to 5.2. Over the longer run, monthly organic clicks grew from 8K to 28K.
If you want an ecommerce SEO agency London or UK-wide that will show you Search Console data instead of a slide deck, that’s what this page is built to prove.
Ecommerce SEO agency London stores can check the receipts on
Is this a fit?
Good fit if you
- Run a Shopify or Shopify Plus store in London, or anywhere in the UK
- Have a technical SEO problem you suspect is bigger than anyone’s told you
- Want your email programme to prove its revenue, not just look nice
- Are evaluating agencies and want to see real, sourced results before a sales call
Not a fit if you
- Want an agency that is physically based in London and meets in person regularly. We work remotely with clients across the UK and worldwide
- Have a brand new store with no traffic yet and need someone very cheap to just get it live
- Are looking for a single, one-off task rather than an ongoing growth partner
Shopify agency London: FAQ
Do you work with Shopify stores in London?
Yes. Monster Piercing, a UK piercing jewellery brand, is one of our longest-standing clients. We’ve worked on their technical SEO, email marketing, sales campaigns, and store design.
Sources: Technical SEO, Email marketing, Store design
What results have you delivered for a UK client?
For Monster Piercing: organic clicks grew from 8K to 28K, technical SEO fixes added +50% clicks and +43% impressions in 90 days, email sales lifted 335% after a platform migration, and two sale campaigns generated £23,800 and a 23% monthly revenue jump.
Sources: Organic clicks, Email sales lift, Spring sale, Summer sale
Are you based in London?
No, we’re not a local London agency. We’re a Shopify Plus growth agency working with stores across the UK, US and Australia, including London and UK-based brands. We work remotely.
Do you have experience with jewellery or fashion ecommerce?
Yes. Monster Piercing sells piercing and body jewellery online, and we’ve handled their SEO, email marketing, and store design work.
Can you fix a technical SEO problem that’s been ignored for a while?
Yes. That’s exactly what we did for Monster Piercing, whose crawl budget was being wasted on over 7 million junk URLs before we found it. Search Console data backs up the results.
Sources: Technical SEO case study
Want the same kind of results for your UK store?
Book a free Shopify store audit. We’ll look at what’s actually holding your store back, the same way we did for Monster Piercing, and give you a plan with no pressure to sign anything.