When Whito checked ten UK trade directory and lead platforms in June 2026, only three published their full prices, and Bark sells a single enquiry to as many as five businesses (the full pricing research is here). Those platforms are advertising, and they are entitled to be. The point is that a top listing on one tells you what a business is willing to spend, and nothing else.
This page does not rank anybody. It is a list of 20 businesses in London that Whito holds a record for, grouped by trade, showing what we have checked against each one and what we have not.
The useful question when you are hiring locally is not who is top. It is what can be checked before you ring anyone.
What is on this page, and what is missing
Whito holds 20 London businesses across 9 trades. Of those, 20 carry a company number recorded on their listing and 0 do not.
Nobody on this page paid to be here. Position is never for sale, we host no customer reviews and we never invent them, and we do not arrange quotes or pass your details to anyone.
Businesses in London by trade
Plumbers and heating engineers (10)
| Business | What they do | Company number | Trading since |
|---|---|---|---|
| Culkin Plumbing and Heating | Founder-run North West London firm handling plumbing, gas and heating across the NW postcodes since 2012. | 07980305 | 2012 |
| Dulwich Plumber | Dulwich based plumbing, boiler and heating service with published rates and 24/7 call-out across SE London. | 12110363 | 2019 |
| Green Plumbers & Heating Services | Lavender Hill registered plumbing and heating firm serving the SW postcodes with 24/7 call-out. | 13230813 | 2021 |
| Hackney Plumbing and Heating | Family-run Hackney firm providing boiler, heating and plumbing services across East London. | 11040363 | 2017 |
| Kemco Plumbing & Heating | Clapham based independent covering plumbing, boilers and landlord certificates across South West and Central London. | 08375085 | 2013 |
| Maintracts Services | Tooting based multi-trade plumbing, heating, electrical and drainage firm trading since 1974. | 04134448 | 2001 |
| MML Plumbing | North London plumbing firm specialising in non-invasive leak detection and trace-and-access reports. | 12861184 | 2020 |
| NV Plumbing & Heating | Blackheath based plumbing and heating firm covering Greenwich, Charlton, Eltham and the wider SE postcodes. | 09743723 | 2015 |
| Plumbing Wise | Family-run North London heating firm covering boiler installation, repair and servicing into Hertfordshire and Essex. | 10550562 | 2017 |
| Pure Energy Project | Plumbing, heating and electrical contractor in north west London | 07376330 | 2010 |
More: all plumbers and heating engineers on Whito.
Vets (3)
| Business | What they do | Company number | Trading since |
|---|---|---|---|
| Amwell Veterinary Practice | Neighbourhood vets in Clerkenwell | 04614836 | 2002 |
| London Vet Clinic | Independent Marylebone practice founded in 1973 | 03053413 | 1995 |
| The Exotic Animal Vets | Specialist-led exotics practice in Urmston | 16059398 | 2024 |
More: all vets on Whito.
Other trades (7)
Trades where Whito currently holds one or two London businesses. Thin, and shown as thin rather than padded out.
| Trade | Business | Company number | Trading since |
|---|---|---|---|
| Architects | Architecture for London | 07249917 | 2010 |
| Estate agents | Frank Harris & Co | 09898555 | 2015 |
| Mortgage advisers | Coreco | OC371927 | 2012 |
| Nurseries | Little Green Nursery | 13400502 | 2021 |
| Printers | Custom Packaging Boxes | 13155258 | 2021 |
| Refurbished phones | QwikFone | 08742544 | 2013 |
| Solicitors | Bishop & Sewell | OC319691 | 2006 |
Three things to check before you hire any of them
Ask for the company number, then look it up yourself. Companies House is free and takes a minute. Check the company is active, check the name on the quote matches the name on the register, and check the trading history is as long as the sales pitch says.
Get the price in writing, with what is excluded. Not a day rate. A total, stating whether VAT is included and what happens if the job runs over. The arguments start where the number was never written down.
Ask who carries the risk. Public liability insurance for trades, and for a regulated trade the regulator entry as well. If a business cannot produce either in writing, that is your answer.
The takeaway
A listing is a starting point, never a verdict. Use this page to find London businesses worth a phone call, then spend the ten minutes checking the register yourself. Ten minutes on the public record is the cheapest due diligence there is.
Run a business in London? List it on Whito for free, or check your website for free and see whether AI assistants can find you at all.
Browse every category on the Whito directory.