Thanks a lot for your reply, I had quite a chuckle at your sentence - Replacing the boiler.....
I thought it might have been something I could do myself, I'll give it some thought.
Hi,
I have a Worcester oil boiler that works perfectly well, although about eight years old.
My question is about the electronic timer (if you google T23OE7 there are dozens of images and offers for around £145).
I only use the heating in the ON or OFF mode on the timer and leave the hot water...