A member of the public was having some refurbishment work undertaken at their property, the contractor cut through a buried live gas pipe in a concrete floor in the living room. 

Is this incident RIDDOR reportable as a dangerous occurence?

query:- was the contractor at risk (potential explosion) due to cutting through a buried gas pipe as the contractor was exposed to gas?

no injuries to contractor, nor hospital treatmnet

your comments will be appreciated

"Release of flammable liquids and gases

• 26 The sudden, unintentional and uncontrolled release:
  1. inside a building
     1. of 100 kilograms or more of a flammable liquid;
     2. of 10 kilograms or more of a flammable liquid at a temperature above its normal boiling point;
     3. of 10 kilograms or more of a flammable gas; or
  2. in the open air, of 500 kilograms or more of a flammable liquid or gas.

Pipelines or pipeline works

• 21 In relation to a pipeline or pipeline works:
  1. any damage to, accidental or uncontrolled release from or inrush of anything into a pipeline;"

Thats what the HSE says

A gas release would cause a risk of explosion with a number of ignition sources that could potentially be in a living room that wasnt prepared for a gas release.