"Owain" wrote in message
...
tvmo wrote:
1. I can replace the boiler for a modern one without changing the
pipework [1]
[1] This is on the provision that the pipework is pressure tested and
found to be sound

And that the existing pipework has sufficient controls eg radiator valves
to meet Part L of the building regs.

Rad valves only in the sleeping areas to meet Part L.