Wow! I certainly opened a can of worms when I started this posting!
I really, genuinely, thought I was passing on details of a very useful service.
I am a 64 y/o moderately disabled person on a fixed income. No way could I even contemplate doing any of this type of work myself as I have neither the skills or physical ability.
I was surprised to hear of the delays in attending from various posters. In the two cases in which I have used this service, the first attended the same days the call and returned at 9.00 am the following day with the required part and it was fitted by approx. midday - 24 to 28 hours after initial call. In the second (most recent) case, a call at midday resulted in an engineer arriving the following day at 2.00 pm. He didn't have the part (heat exchanger) and arranged for 9.00 am attendance following day. This part was fitted, but it became obvious that the fan needed replacing. Engineer back the next morning with fan. It then became apparent that the gas valve needed replacing - should this have been foreseen? I have no idea. Because the job had already gone on for three days, the new gas valve was couriered from Leicester to Lincoln. The Engineer tried to source one locally but the nearest was in Hull, four hours return journey time. The valve arrived at 2.30 pm, I phoned the Engineer who had gone onto another job, he returned at 3.00 pm, replaced the valve and left the system up and running perfectly.
The Engineers were pleasant and courteous and seemed to know what they were doing.
Now, that seems a reasonable service to me.
Paying the annual insurance premium means that I can budget for all repairs to the system and I am not going to be hit with a sudden large bill, or have the hassle of finding an engineer So far, I have received a fast response - I am not a priority case - unlike some other posters.
My original post was meant to be of interest to other members of the group. I have no connection whatsoever with Britisg Gas apart from being a customer.
Terence