Been a long time now since we've had ours on timer. We're actually just about to get a new boiler - it needs a spare part which is no longer available as they stopped making the boiler in 2004, when we'd only had it 5 years!
Boiler still works so NP with heating, just no hot water - diverter valve is what doesn't work. They mended something else before Xmas when the boiler stopped working entirely, engineer said could replace it for a couple of grand, we said That's OK, send us a quote then - nearer £6k when it came. So we asked a plumber we know - sent us a proper quote - you guessed, a couple of grand! So he's booked! Will be able to let us know before the end of the week, what date(s).