hi les the estimate that you have had sounds about wright for a boiler to be fitted correctly and registered people see the price of a boiler and think it can be fitted for 150 quid I would love to be able to do it at that price id have work seven days a week but because of the high costs involved in being gas registered and running a van and pli insurance and all the tools required to fit the boiler to manufactures instructions and commission it correctly so that the warranty isn't voided these are hidden costs that people just don't consider !!!!! sorry ranting again !!!!