Why this checklist matters for London teams
London organisations often arrive at Webflow after years on legacy CMSs, patchwork plugins, and brittle templates. The move is usually tied to a rebrand, international rollout, or a long-delayed accessibility push. A disciplined migration process avoids ranking loss, broken journeys, and compliance gaps. This guide is written for decision‑makers who need a clear plan they can defend internally and execute with an agency or in‑house team.
The focus here is practical: reduce SEO risk, move content predictably, harden analytics and consent, and launch with confidence. We assume a UK context (UK GDPR/PECR, accessibility expectations aligned to WCAG 2.2) and a London market where competition is high and site speed and conversion hygiene matter. If your scope includes a domain change or major URL restructure, pay particular attention to redirect mapping and post‑launch monitoring windows.
Pre‑migration discovery: map what you have
Start with a full content and URL inventory. Crawl the current site to capture every indexable URL, canonical tags, meta data, hreflang, structured data, pagination, internal linking, and robots directives. Export analytics landing pages and top queries to prioritise fragile or high‑value templates. Create a one‑to‑one mapping from every old URL to its new Webflow destination; where consolidation is planned, define clear canonical targets rather than sending everything to the homepage.
Assess dependencies and integrations. List forms and their downstream systems (CRM, MAP), custom scripts, tag manager containers, consent tools, search indexes, and embedded services. For media, calculate total asset volume, image/video formats, and likely compression or format changes. Identify content types to become Webflow CMS Collections and define field models now to reduce import friction later. Lock a freeze window to minimise last‑minute changes on the legacy site before cutover.
SEO foundations: redirects, canonicals, and sitemaps
Treat URL mapping as a build task, not a go‑live scramble. For each legacy URL, specify a single final destination (avoid chains), then implement permanent server‑side redirects. Keep redirect chains as short as possible and avoid funneling many unrelated URLs to the homepage, which can be treated as soft‑404s. Submit new sitemaps, test a sample of redirects, and expect temporary ranking fluctuations while Google re‑crawls. Where you’re changing domains, submit a Change of Address in Search Console and keep redirects active for at least a year. ([developers.google.com](https://developers.google.com/search/docs/crawling-indexing/site-move-with-url-changes?utm_source=openai))
Rebuild on‑page signals deliberately. Ensure every new page has a self‑referencing canonical, clean internal links, and—if applicable—updated hreflang to the new URLs, all of which should match the final URL structure in your mapping. If you rely on structured data, follow Google’s general guidelines, prefer JSON‑LD, ensure it reflects visible content, and validate with Search Console/Rich Results testing during staging and after launch. ([developers.google.com](https://developers.google.com/search/docs/crawling-indexing/site-move-with-url-changes?utm_source=openai))
Webflow supports page‑level SEO settings. As part of the template QA, set unique titles and meta descriptions per page type (and per locale if you use Webflow Localization). Publish and allow time for search engines to refresh snippets; you can request recrawls for key templates in Search Console. ([help.webflow.com](https://help.webflow.com/hc/en-us/articles/33961237278611-Add-SEO-title-and-meta-description?utm_source=openai))
Content and CMS migration to Webflow
Model CMS content before import. Define Collections (e.g., Articles, Case Studies, Team) with the fields you need now and in the next 12–24 months. Webflow supports CSV import for bulk loading new or updating existing items, including mapping to reference fields, so you can move hundreds or thousands of items predictably. Keep a CSV export of legacy content as a backup and plan test imports for a small subset before full runs. ([help.webflow.com](https://help.webflow.com/hc/en-us/articles/33961290794771?utm_source=openai))
Implement redirects in Webflow as soon as new slugs are final. Use 301 rules at Site settings > Publishing > 301 redirects. Prefer wildcard patterns to minimise the number of rules and reduce maintenance overhead; test edge cases (query strings, trailing slashes, case sensitivity). If you need to automate or manage redirects at scale (enterprise or programmatic workflows), Webflow’s Data API provides endpoints for listing, creating, and updating 301s. ([help.webflow.com](https://help.webflow.com/hc/en-us/articles/33961294898835-Set-301-redirects-to-maintain-SEO-ranking?utm_source=openai))
During content QA, check assets and semantics as if you were a user and a crawler: correct headings, alt text for meaningful images, descriptive link text, and consistent component usage. Ensure that any legacy noindex directives aren’t accidentally carried across. For media, set sensible image dimensions and compression; defer heavy embeds where possible.
Performance and UX: Core Web Vitals and accessibility
Core Web Vitals still steer the user experience targets. Since March 2024, Interaction to Next Paint (INP) replaced First Input Delay (FID) as the responsiveness metric, so test interactivity on real devices, not just lab tools. In Webflow builds, keep interaction logic lean, minimise third‑party scripts, and avoid long main‑thread tasks that delay input processing. Validate field performance with PageSpeed Insights/CrUX for your templates after launch. ([web.dev](https://web.dev/blog/inp-cwv-march-12?utm_source=openai))
Bake accessibility into components, not as a post‑hoc fix. Align to WCAG 2.2, prioritising level A/AA criteria such as focus visibility and target size, and remove friction in forms and authentication. Use semantic HTML in Webflow components, ensure keyboard navigation works, and maintain sufficient colour contrast and focus states across themes and locales. Treat this as a policy for all new content and design variants, not a one‑off audit. ([w3.org](https://www.w3.org/TR/WCAG22/?utm_source=openai))
For London audiences, assume varied devices, assistive technologies, and bandwidth. Set performance budgets per template (HTML size, JS execution time, image weight), compress images, use modern formats where appropriate, and lazy‑load below‑the‑fold media. Keep UI predictable during localisation and across breakpoints to avoid layout shifts.
Data, tracking, and UK legal essentials
Rebuild analytics with intent. Define a concise event model in GA4 or your analytics of choice, and name events consistently across the old and new sites to enable like‑for‑like reporting. Migrate key conversions (lead forms, demo requests, downloads) and QA with test submissions in a staging container. If you use server‑side tagging, budget extra time for DNS and consent integration changes.
Review consent and privacy for the UK. Under PECR and UK GDPR, non‑essential cookies require informed, freely given, specific consent via a positive action. Avoid dropping non‑essential tags before consent; ensure your consent platform integrates with your tag manager and respects choices across pages and locales. Update your cookie and privacy notices to reflect any new vendors introduced during the migration. ([ico.org.uk](https://ico.org.uk/for-organisations/direct-marketing-and-privacy-and-electronic-communications/guide-to-pecr/cookies-and-similar-technologies/?utm_source=openai))
Document data flows and access. Confirm ownership of Search Console and analytics properties, rotate API keys and tokens, and restrict edit roles to named teams. If you’re changing domains, verify both old and new properties in Search Console ahead of launch so you can submit a Change of Address where applicable. ([developers.google.com](https://developers.google.com/search/docs/crawling-indexing/site-move-with-url-changes?utm_source=openai))
Launch, post‑launch monitoring, and governance
Choose a low‑traffic window (out‑of‑hours UK time) and run a rehearsed cutover: publish Webflow, switch DNS, enable SSL, activate redirects, submit sitemaps, and push the staging tag manager container live. Validate a sample of top landing pages with live checks: status codes, canonicals, meta tags, robots directives, hreflang, structured data, key forms, and consent behaviour. Expect some ranking volatility and monitor crawl/indexing signals closely.
For domain changes, submit a Change of Address in Search Console once redirects are live. Keep 301s for at least 12 months, continue to update internal and high‑value external links to point directly to final destinations, and monitor for redirect chains introduced after launch. Re‑test Core Web Vitals and event tracking, and watch error budgets. ([developers.google.com](https://developers.google.com/search/docs/crawling-indexing/site-move-with-url-changes?utm_source=openai))
Institutionalise the wins. Capture the migration artefacts—URL map, redirect rules, CMS models, component library, accessibility checklist, and tracking plan—in your documentation. Train content editors on Webflow patterns, page‑level SEO settings, and accessibility basics so quality doesn’t regress as new pages roll out. Set quarterly audits for redirects, internal links, and template performance to keep the site fast, compliant, and easy to change. ([help.webflow.com](https://help.webflow.com/hc/en-us/articles/33961237278611-Add-SEO-title-and-meta-description?utm_source=openai))