Gas Engineer
CLS
Credentials & registries
1 named source
Trust score
82out of 100
Rating4.9★
Review volume159
Source diversity1 source
VerificationVerified
Based on rating, review volume, independent sources and verification. Evidence context — not a guarantee of workmanship.
Trust at a glance
1 checkWhat we can verify about CLS
Each card summarises one evidence dimension from public sources — open it for the full detail and named source. This is evidence context, not a guarantee.
See the full verification checklist for CLS →Reviews · public evidence
What customers say
4.9out of 5
Highlights
"Due to advancing years my wife and I decided to change the bath for a walk-in shower. The work was carried out by Matt and Liam of CLS Horley. You couldn't ask for a better job. Excellent workmanship throughout, very tidy and cleaned up every evening. I would recommend this local company to anybody who wants a good job doing at a very fair price. Just remember to factor in the cost of tea and coffee as they don't like going thirsty. In summary then, a perfect job by two lovely people."
"I had bath taken out and new walk in shower, new toilet and sink vanity unit installed. Matt and Liam are such professionals made sure all the carpets wer covered before starting the job. Cleaned up everyday. Nothing was too much trouble. Consulted me at every stage to make sure it was what we wanted. I would always call on them to do any jobs for me. Thanks again"
"External drain clearance Guy turned up promptly as advised , completed the drain clearance quickly and efficiently and cleaned up after. Much appreciated."
Detailed reviews
Due to advancing years my wife and I decided to change the bath for a walk-in shower. The work was carried out by Matt and Liam of CLS Horley. You couldn't ask for a better job. Excellent workmanship throughout, very tidy and cleaned up every evening. I would recommend this local company to anybody who wants a good job doing at a very fair price. Just remember to factor in the cost of tea and coffee as they don't like going thirsty. In summary then, a perfect job by two lovely people.
I had bath taken out and new walk in shower, new toilet and sink vanity unit installed. Matt and Liam are such professionals made sure all the carpets wer covered before starting the job. Cleaned up everyday. Nothing was too much trouble. Consulted me at every stage to make sure it was what we wanted. I would always call on them to do any jobs for me. Thanks again
External drain clearance Guy turned up promptly as advised , completed the drain clearance quickly and efficiently and cleaned up after. Much appreciated.
Page 1 of 8
About
Verified drain / sewer clearance in Horley, Surrey.
Credentials and associations
1Named registry and membership evidence
Official or controlled checks carry the strongest weight here. Listed, missing, and ambiguous evidence stays visibly weaker than a verified pass.
Public evidence checks
Public evidence shownTrust checks and red flags
Public review evidence4.9★ from 159 public reviewsAcross CheckatradeCheckatradeCity & Guilds Qualified - Level 2
Sources
1 named sourcesEvery signal, traced to its origin
Review sources
Public evidence checks
What's strong, and what to check yourself
✓Strong signals
✓Rating: 4.9★
✓Review volume: 159
✓Verification: Verified
✓1 verified credential
!Worth checking yourself
!Source diversity: 1 source
Smart checks
Before you hire a gas engineer
By law, anyone working on your gas appliances must be on the Gas Safe Register — ask to see their Gas Safe ID card and check the licence number at gassaferegister.co.uk before they start.
Never let an unregistered person touch your gas: unsafe gas work risks carbon monoxide poisoning, fire and explosion, and is a criminal offence.
For a boiler or appliance install, get the work and price in writing and keep the Gas Safe / Building Regulations certificate they are required to give you.
Confirm they cover your area and can actually come out in your timeframe before anything else.
Read recent reviews for reliability and turning up on time — not only the quality of the work.
Good to know
Common questions about CLS
What do customers say about CLS?
CLS has 159 public reviews, averaging 4.9 out of 5. You can read the individual reviews and where each came from in the reviews section above.
Is CLS qualified and accredited?
We hold 1 independently sourced credential for CLS, including City & Guilds Qualified - Level 2. Each is attributed to the body that issued it in the credentials section.
Want an extra legitimacy check?
Run the Cowboy Checker on CLS before you contact them.