London, UK · Serving UK/EU · GBP pricing
GA4 expert. Nine years building measurement systems that actually work.
GA4 expert for businesses that need decision-grade data.
Marc Alexander is a GA4 expert based in London with nine years' experience designing analytics infrastructure for organisations from luxury property platforms to global real estate consultancies.
He's led GA4 rollouts across 50+ international websites, built measurement systems integrating GA4 with BigQuery and CRM platforms, and solved the tracking problems that quietly ruin decision-making—conversions firing twice, attribution breaking at checkout, revenue never matching the payment processor, and UTM parameters doing interpretive dance.
The outcome is measurement that reflects reality, not optimism.
Marc holds Google Analytics 4 Certification and ContentSquare Certified Expert credentials.
See how Marc works with businesses as a Google Analytics Consultant →
His work has delivered measurable commercial impact including 27% increases in qualified leads, £10k–£15k implementation cost savings, and analytics infrastructure supporting strategic decisions across marketing, product, and executive leadership.
Proven GA4 expert across complex implementations
Knight Frank: GA4 migration across 50+ international websites
The challenge:
Global real estate consultancy needed GA4 rollout across 50+ international websites during major digital transformation, maintaining data continuity whilst ensuring GDPR compliance and measurable business outcomes.
Marc's approach:
Designed CMS-integrated measurement automation where page metadata automatically generated dataLayers, eliminating manual tagging overhead. Built universal form tracking architecture capturing all forms across all websites without individual tagging.
Integrated unique conversion IDs connecting GA4 to LeadPro CRM for complete attribution from first visit through to closed deals.
Used GA4 and ContentSquare to identify 80% drop-off on high-value enquiry forms, then collaborated with UX to fix friction points.
Results:
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27% increase in qualified leads after identifying and fixing form friction points causing 80% abandonment
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49% conversion rate on high-intent Market Appraisal forms from organic traffic
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Scalable analytics architecture supporting international offices and 50+ websites with consistent measurement standards
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Recognised as part of Knight Frank's Project Team of the Year 2024
Key technical delivery:
CMS-driven dataLayer automation, identity stitching between GA4 and CRM, GDPR-compliant privacy framework with Consent Mode v2, executive dashboards in Looker Studio and Power BI connecting digital performance to revenue.
Read full Knight Frank case study →
The Super Prime: Universal ecommerce tracking without backend infrastructure
The challenge:
Luxury property platform needed comprehensive GA4 ecommerce tracking to understand user engagement and measure conversion through enquiry funnel—but had zero existing dataLayer infrastructure and limited development resources.
Marc's approach:
Designed and deployed universal GA4 ecommerce tracking layer through Google Tag Manager that intelligently infers product data from page structure and network traffic, automatically generating dataLayer events without any backend code changes.
Results:
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Complete funnel visibility from listing impression through property detail view to enquiry submission
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Full ecommerce tracking deployed in under two weeks with zero website code changes
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Estimated £10k–£15k savings versus traditional backend implementation
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Template-resilient tracking surviving site changes without maintenance overhead
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Accurate attribution connecting property views to enquiry submissions
Key technical delivery:
DOM signature analysis for pattern recognition, network traffic monitoring capturing post-load conversion events, spatial analysis solving pricing ambiguity, GA4-compliant event formatting across view_item_list, view_item, add_to_cart, begin_checkout, and purchase events.
Professional credentials and experience
9 years' digital analytics experience designing and leading analytics ecosystems for global organisations across property, fintech, and national tourism sectors.
Google Analytics 4 Certification demonstrating current platform expertise and best practices.
ContentSquare Certified Expert combining behavioural analytics with GA4 for comprehensive user insight.
50+ international websites managed at Knight Frank, delivering consistent measurement standards across multiple markets, languages, and property types.
Technical capabilities: GA4, Google Tag Manager (client and server-side), TagCommander, BigQuery, SQL, Python, Power BI, Looker Studio, Tableau, dataLayer and event schema design, identity stitching, attribution modelling, A/B testing, CRO, GDPR compliance, consent management.
Cross-industry expertise:
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Global real estate (Knight Frank): 50+ countries, multi-market complexity, CRM integration
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Luxury property (The Super Prime): High-value transactions, complex user journeys
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Fintech payments (WorldFirst): Transactional data integration, LTV and ROAS analysis
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National tourism (VisitBritain): Multi-market campaigns, ROI measurement
Mentoring and training:
Developed and delivered GA4 training programmes, mentored analysts on modern analytics practices, created documentation and governance frameworks ensuring long-term measurement quality.
Published articles demonstrating GA4 expertise
Marc writes plainly about GA4 implementation, privacy compliance, and measurement strategy on his Articles section:
Modern browser privacy protections have made link-based attribution less reliable. This article explains how Link Tracking Protection strips UTM parameters and what to do about it without breaking GDPR compliance.
SEO optimisation with Google Search Console and GA4: the practical framework →
Search Console tells you what Google is doing with your pages. GA4 tells you what people do once they arrive. Most businesses have both but can't join the dots in a way that survives a meeting. This framework shows how.
GA4 Audit Checklist: The 10 Checks That Stop "Broken Data" →
GA4 is rarely "wrong"—it faithfully reports whatever you've actually implemented, including the bits you didn't mean to implement. This publish-ready audit identifies the specific checks that prevent broken data.
The GA4 Interface Was Never Designed to be a Reporting Tool →
There's a persistent misconception that the GA4 interface is where business reporting should live. Treating it like one is a strategic mistake. This article explains why and what to do instead.
The Ideal GA4 Measurement Plan: Who To Involve, What You Agree, How You Keep It Updated →
A good measurement plan isn't a technical document—it's an operating agreement defining what success means, how you will measure it, and who needs what data to make decisions. This guide shows how to build one that actually gets used.
Why businesses work with Marc
Senior, independent GA4 expert. No agency overhead, no account managers, no junior "learning experience." Clients work directly with Marc—the person doing the implementation, testing, and explanation.
Plain-English analytics. Marc explains GA4 clearly and calmly. If something doesn't make sense, it gets explained better. Nobody leaves a call feeling like GA4 is a personality test.
Fixes what moves the needle. Not every GA4 issue is worth fixing today. Marc prioritises problems affecting revenue, attribution, conversion optimisation, and decision confidence.
Built to last. Documentation, governance, and training are baked in. The goal is a setup your team can run, not one requiring permanent consultant dependency.
Proven commercial impact. Marc's work delivers measurable outcomes—27% lead generation improvements, £10k–£15k implementation savings, analytics infrastructure supporting strategic decisions across organisations.
How Marc can help your organisation
If your organisation faces GA4 challenges similar to those solved at Knight Frank or The Super Prime, Marc can help:
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GA4 migrations requiring analytics continuity and re-architecture during website transformations
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Multi-site or multi-brand measurement needing consistent standards at scale without manual overhead
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CRM and back-office integration connecting website behaviour to business outcomes and revenue
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Privacy and GDPR compliance whilst maintaining analytical capability and consent rates
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Complex tracking implementations requiring technical expertise beyond standard GA4 setups
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Lead generation optimisation using data to improve conversion rates and funnel performance
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Analytics training and mentoring building internal team capability for long-term self-sufficiency
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Executive reporting providing clear visibility into digital performance and commercial outcomes
Who works with Marc?
Marc works with mid-market and enterprise businesses across sectors including:
E-commerce & Retail
Track cart abandonment, product performance, customer lifetime value, and cross-sell opportunities. Whether you're on Shopify, WooCommerce, Magento, or a custom platform, Marc ensures accurate revenue tracking that feeds your marketing optimisation.
SaaS & Subscription Businesses
Track trial signups, activation rates, feature usage, and churn. Marc sets up custom events that reveal your product funnel bottlenecks and connects GA4 data to your CRM for complete user journey visibility.
Financial Services
Complex tracking with strict compliance requirements. Marc implements privacy-first measurement that captures what you need whilst keeping you firmly on the right side of FCA regulations and data protection laws.
Property & Real Estate
Track enquiries, viewings, property views, and lead quality. Marc helps you understand which marketing channels drive serious buyers versus tyre-kickers, so you can allocate budget accordingly.
Professional Services
Measure content engagement, lead generation, and client acquisition journeys. Marc connects GA4 to your CRM so you can see the full picture from first click to signed contract.
Publishing & Media
Track content performance, reader engagement, subscription conversions, and advertising effectiveness. Marc helps you understand what content actually works, not just what gets clicks.
Why choose an independent GA4 expert over an agency?
Focus and expertise
Agencies juggle multiple tools and platforms. Marc specialises exclusively in Google Analytics, Google Tag Manager, and the Google Marketing Platform ecosystem.
This depth of focus means faster implementations, better troubleshooting, and strategic insights that generalist agencies miss because they're also trying to remember how TikTok ads work.
Direct access
When you work with Marc, you work with Marc—not a junior team member learning on your account whilst a senior person reviews their work three days later.
Every audit, setup, and strategic decision gets expert-level attention. No "I'll check with my manager" moments.
Cost efficiency
No agency overhead. No account management layers. No paying for someone's Shoreditch office rent and ping-pong table.
You pay for expertise and execution, not organisational complexity.
Flexibility and speed
Independent consultants move faster. Need an urgent fix before a board presentation? Marc can typically respond within 24-48 hours, not "let me check everyone's calendars and get back to you next week."
Need to scale up or down? No long-term contracts or minimum commitments. You work together when it makes sense, not because you're locked into a 12-month retainer.
Business-aligned thinking
Marc doesn't just implement tracking—he aligns measurement with your commercial objectives.
Whether you're optimising for lifetime value, attribution modelling across channels, or connecting analytics to offline conversions, the setup reflects how your business actually operates.
Not how Google's documentation assumes businesses operate. Not how the agency template suggests. How your business works.
Ready to make your analytics decision-grade?
Whether you need GA4 implementation, analytics strategy, technical integration, or ongoing support, Marc can help transform your data into reliable business intelligence.
Schedule Your Free Consultation →
Or explore Marc's services:
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38-Point GA4 Audit — Find and fix what's broken (£175–£1,800)
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Expert GA4 Setup — Build it properly from day one (£350–£1,300)
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GA4 Training — Make your team self-sufficient (Custom pricing)
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BigQuery Integration — Unlimited, unsampled analysis
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GA4 to Back Office Integration — Bridge GA4 with your CRM