joni2008

Thanks for helping.
I've installed a pressure reducing valve (Honeywell) on the cold feed under the bath.
This still doesn't do the trick after messing around for ages trying to get the balance - if anything the shower is's worse and there was a loud knocking noise under the bath from the pipes - fiddled with the pressure valve and that stopped eventually. Also since fitting this valve, a few days later the hot water stopped flowing altogether - I had to back force the cold through the hot taps to clear the air lock (Hope this doesn't happen again)

I've decided to go for an electric shower after all the hassle as this will be the easiest to install without changing the system too much.