Plumber attended this morning very promptly to attend to boiler, he carried out a thorough check of parts to see what the issue was as to why it wasn`t working as it should. He found two items that required replacing but on further investigation, deemed that it would not be cost effective to repair the boiler as there were further issues that gave him concern, not safe to use, and said it would be more expensive to repair the boiler for the amount of time of it`s life left working, so advised about a replacement and also arranged all of this, and gave a date he would attend. At least happy to know where I am with this, it has been working non stop very well since installation fourteen years ago, this is the first time it has failed. I have been advised of a even better boiler to have fitted and am taking this option up. These things happen sometimes.