The only sensible post on this thread is from Ambrosia.
You cannot do a LLGC with no gas. It is stupid to suggest so. The LL HAS to make every effort to gain entry and complete the works. The Agent should have a plan on place, including a clause to the effect that the tenant will be responsible for any costs involved in obtaining a court order to gain entry, or preferably that they are responsible for charges involving the engineer having to traipse away to top up a card. The agents should be giving the tenants notice f the visit, with a note to ensure gas is available.
Leidad, why the heck are you worried about upsetting the agent? YOU are the expert, not them. Make sure you know exactly what is required of you and them under the regs. Document the no gas situation with photos showing the meter with its number and the OFF notification. Are these tenants using gas at all? If not, then, yes, offer to disconnect the gas, otherwise it is not your problem. Rearrange a visit and charge according to your agreement with the Agent.(You do HAVE a proper agreement with T&C's?)
Grid will not cap off just because there is no LLGSC, only if there is an ID situation. So, in that sense they re not responsible after the ECV. if you phne them and you say there is an actual ID problem, they will then act.
Gasman, using a replacement meter is illegal theft of gas. How on earth can you charge 50p for the gas when you have no way of paying it to the supplier. As i t happens, I also have an old meter on the van, but giving theft advice, and actually telling someone to write down the fact that he has done it, here is a bit daft IMO. You could use a "spare" meter or even knock up a bypass kit but:
HOW WILL YOU PURGE WHEN YOU REFIT THE OLD METER??
To sum up:
Tell the Agent to arrange appointment and explain they MUST have gas on meter or charges will apply
If no gas on the job, then document and photo
Charge accordingly
Repeat
repeat
Repeat
Remember - it is not your legal duty to provide a valid cert when no gas is available - it is the Landlords responsibility to provide one.