Thanks for the reply.
Could anyone confirm which i require:
Ballofix in the cold water supply(flow),PRV(pressure reduction) or NRV(not sure why this is required?)
Thanks.
Recently upgraded to a combi boiler.
Old system supplied a mixer shower-Aqualisa 430.
The shower has to be turned to full to achieve temperature.
Would fitting a PRV in the cold water feed to the shower allow more accurate temperature control?