Which poses a question, if you have a gas valve letting by and no smell of gas and within allowance Mb drop can you let it go?
As I had this the other day on BR Avanta plus
The landlord opted to have it changed but was not sure if it would have been ok letting by 0.5 mb over 2 mins no smell of gas
Of course you cant leave it once you know its the gas valve. Its a safety device that has failed and is ID.