Not sure if this is the right place to post this query, but having just moved into a new flat our boiler seems to be playing up. For two weeks we have had no problems with hot water or heating, yet suddenly last night the boiler appeared to have stopped igniting - it would start, then just click off. Having called in a plumber, he identified a problem with the pump next to the copper cylinder - and we now have heating, however, he claims our cylinder has sprung a leak so we have to replace the whole cylinde - and as he has switched off our hot water we have to do something about this quickly. I take it this is not a job that we could do for ourselves, and wondered if anyone had any idea whether this advice was correct (although understandably it is difficult without seeing the problem) and whether A £350 quote sounds about reasonable for replacement inc labour