What is the quality of these boilers. Do they have a good reputation and are the spares hard to get and/or expensive. What other boiler would you recomment for a small flat or would it be better to have some form of electric water heating for shower etc which are only used one at a time and have electric for heating. The places are well insulated and need little heat. Can anyone recommend a reliable and reasonably priced sensible plumber/Corgi engineer in the E1 area of London. Thanks of your responses.