thePLUMBERS.orgtheplumbers.org has been on Checkatrade since November 2014 — 522 reviews and a 9.89/10 later, the pattern in them is consistent: the phone gets answered, the van turns up when promised, the work is tidy, and the invoice matches the quote.
The firm is led hands-on by its founder — you'll meet him at the survey, and you'll find him in review after review, listening first and quoting straight. Around him is a settled team of plumbing, heating, tiling and building trades, which is why a full bathroom renovation here has one schedule and one point of contact instead of four subcontractors.
Bathrooms are the flagship — the gallery speaks for itself — and the Gas Safe registered heating side (reg. 501769) keeps West London's boilers alive at unsociable hours. Long-term customers are the quiet proof: "I've used this company for 10 years" is a real Google review.

The founder — the face you'll see at your survey.
We run a 24-hour call-out service across West London. Reviews describe engineers arriving "within the hour" and "within 2-3 hours" — and the phone being answered straight away.
Yes — our gas engineers work under Gas Safe registration 501769, covering boiler installations, repairs, servicing and landlord CP12 certificates.
We visit, listen to what you want, and come back with a clear quote and design suggestions — reviewers mention the invoice matching the quote exactly. One team then handles the whole job start to finish.
West and South-West London: London, Isleworth, Brentford, Chiswick, Kensington, Barnes, Fulham, Kingston, Hampton, St Margarets, Acton, Knightsbridge, Twickenham, Hounslow, Clapham, Hanwell, Ealing, Richmond and surrounding areas.
Constantly — CP12 certificates, tenant call-outs and maintenance. One landlord's review: "I trust them to work in my properties unescorted."
No call centres. WhatsApp goes to the team.