Anyone know if there's a qualification/industry standard for oil fired
boiler/heating engineers/plumbers similar to CORGI? I'm about to
install a new oil fired boiler to replace the *two* we have now (the
house was once split into two apartments), and just to be sure I'd
like to know whether I should be looking for a particularly qualified
source of 'professional help' when the time comes....

Also - is it neccessary to seek building warant approval if I'm just
'replacing' an existing boiler?

Cheers

Tim