Replacement of Central Heating Boiler

Existing central heating boiler is over 15 years old and is continually breaking down. Spare parts are no longer available due to age. We wish to replace this with a more efficient boiler which, although slightly larger,and will burn more fuel per hour for fewer hours, it will burn less fuel overall and therefore be more environmentally friendly. The new boiler needs a larger gas meter as the existing meter is not even big enough for the old boiler, and a new meter housing will be needed. We will also need to excavate and replace the underground gas pipe with a larger pipe to connect onto the gas main.