Hello there, It's my first time of posting , so please be gentle. I have a Newlec calypso plus shower which has severely reduced pressure, Even on the cold setting and turn the handset upside down, it goes about two inches out of the thing, the main problem is that if you turn the water up hotter, the flow gets so slow, right up to the point where if you turn it up to anything over two thirds heat, no water at all comes out... any help would be HUGELY accepted...

Have you checked to make sure the shower head is not plugged. Remove shower head and let us know what kind of pressure you get.

If this doesn't solve the problem, I will need a pick of you your faucet(im not familiar with this brand). May be a plugged cartridge.