Experienced in fitting pre-formed (under tile) tray in wetroom

[ppeetteerr]

Hello, I am installing a new en-suite and need an installer who is experienced in fitting a pre-formed tray and waste outlet into a concrete floor, ready for tiling, as in wetroom) and also some additional plumbing work.
I am private house owner in the East Grinstead area which is on the borders of Surrey, Sussex and Kent