IMO it won't be the pipe lagging unless the pipes run outside or we are talking about a masive house

not a big house at all

Faulty non return valve in the shower/taps??? cold water pressure over coming the hot and blending together :wonder: This is possible!

plausable, but im swaying towards the farting flange not striking the giggling pin thus reducing the fluid transfer to the saggy lipped trout,:D

there we go all sorted, all you need is more custard,:lol:

:lol::lol::lol: That's very helpful :Whatever_