Gas Leak in London? Call 0800 111 999 First

What causes smell of gas in London

• 01
  Ageing fittings

  Compression joints and flexible hoses behind cookers work loose over decades.

• 02
  DIY and damage

  A nail through a buried run, a cooker moved for cleaning, the classics.

• 03
  Appliance faults

  Poor combustion produces carbon monoxide without any gas smell, which is what the alarm is for.

• 04
  Corroded pipework

  Buried steel gas barrel rusts from the outside in, especially under solid floors.

Local conditions we work around

London runs on some of the hardest water in the country, roughly 280 to 320 ppm from the chalk that Thames Water draws on. Scale is the quiet cause behind a surprising share of the emergencies we attend: it narrows pipework, coats heat exchangers until a boiler overheats and locks out, and seizes the very stopcock you need at two in the morning. Add pipework that in much of the city dates to the Victorian or Edwardian build and was last touched in the 1960s, and the failures cluster in ways we can usually predict from the postcode before we arrive.

Covered across London

Same published rate card and the same twelve-month workmanship guarantee everywhere below, there is no postcode loading. Each area has its own page with an arrival time taken from our job records rather than chosen for a website.

Smell of gas in London, your questions