How can I lower the water pressure in my Mira shower uinit ?

>George from Wolves

wrong.
fitting any valve will not adjust pressure only flow.

the only way to lower pressure is a pressure reducing valve.

hi-spec plumbing & heating (essex)
September 2008

The simplest way to reduce pressure/flow would be to add a valve before the shower (you've probably seen them near your sink or toilet, they're called service valves) with one of these fitted, you only need a screwdriver to adjust the flow, and consequently the pressure, to your shower unit.
Hope this helps

George from Wolves
September 2008