Doctor Evil wrote:

Look at a venturi shower mixer. No pumps required to vibrate the house
down, just a cold mains feed and a hot feed from the cylinder. Power shower
performance. Check your mains pressure and that is conforms to the makers
specification.

Does The Evil One (or anyone else for that matter) know where one might
get an H2O shower in blue (i.e. cheap)?

Went down to B&Q the other day to pick one up for a job & found they
seem to have discontinued them. Google shows Plumbworld doing the white
& platinum ones but they're more expensive.