Can anyone recommend a decent 7.5kw shower? Was planning on having a rewire to have a higher powered one (still an option) but gonna be expensive & a lot of work Wondered if there were any near decent low powered ones?

No but I've got a brand new (still boxed) 9.5kw Triton shower for sale for £50 if you want and the money you'd save on buying a new one would go towards your electrical work

you wont need a rewire to fit a higher rated shower...........! you can do it by splitting the tails and fitting and rcd

Ill rephrase that before i get slated !!!!!!!!!!!! You will oviously have to run new cabling to shower.

I put in a 9.5 and I'm not impressed. The water flow is rubbish and it can be tempremental on heating up.

Did you connect it straight to the mains (water) or is it gravity fed from a tank?