The advantage of living in a flat is that we can club together so roughly 10 of us get ours done in one day for £40 each which is excellent for down here where we often pay London prices.
We subscribe to British Gas Home Serve.Our service is due on the 15th but we don't pay on the day so no idea what BG charge for non Home Serve subscribers in London. We have called them out for various heating issues and one of the best investments we have made..
Thanks for the replies. Still seems high to me, considering - assuming theirs nothing amiss - it doesn't usually take much more than three quarters of an hour. Heigh ho, looks like I'll have to pay up, though I'm waiting for 3 more quotes.