Emergency gas leak diagnostics across London

Mains natural gas in the UK is dosed with mercaptan, a sulphurous-smelling odorant that humans can detect at concentrations as low as 0.4 parts per million, well below the lower explosive limit (4,4.5%). If you can smell gas, the concentration is at minimum hundreds of times below the explosive level, but you should still treat it as an emergency and not delay action.

The standard sequence in any UK gas emergency: (1) leave the property and don't switch any electrical equipment; (2) call National Gas Emergency 0800 111 999, they will dispatch a free engineer who will isolate the meter and make the property safe; (3) call us, we'll be with you within 60 minutes to identify the leak source within the property and carry out the permanent repair under our Gas Safe registration.

How we deliver

No surprises, no upselling. The exact path every job follows.

1. 1
   Customer evacuates property
   We instruct evacuation if not already done.
2. 2
   National Gas Emergency Service called
   0800 111 999, they isolate at the meter (free, 24/7).
3. 3
   Our Gas Safe engineer dispatched
   60-minute response across London.
4. 4
   Tightness test
   BS 6891 standard pressure-decay test isolates the leak section.
5. 5
   Sniffer probe survey
   Hydrogen-detection probe pinpoints the leak source.
6. 6
   Permanent repair
   Pipework section replaced, joint remade, or appliance sealed.
7. 7
   Post-repair tightness test
   Verified leak-free before re-pressurising.
8. 8
   Reinstatement & commissioning
   Gas supply restored under controlled re-pressurisation.
9. 9
   Written report & certificate
   For insurance and Gas Safe records.