Fender. I don't agree he is being shafted, do some sums on the required materials for a start. To kick off with, a decent boiler, with decent output, your not going to get much change out of £1000, the flue is extra, radiators £700/800, copper piping is expensive, plus a lot of copper fitting, price the radiator valves up x 10, thermostats, the list go's on with bits and dabs that both the electrician and boiler engineer will use to install such. You then have the labour, and with a job like this there's a lot. Floor boards have to be cut in various places, and taken up, old piping removed, joists cut out for new piping, ceilings drilled out, even positioning and hanging 10 radiators is a big job in its self, again the list of labour go's on. Your also employing two skilled people, and their not going to work for £50 per day, plus either one of them may have a labourer. :0)