Vass wrote:

Would really like to continue the tiled theme throughout the bathroom, so
was thinking of using some ply and tiling it instead of the supplied panel.
The question of access to the plubing (taps and waste for bath only) come to
mind.
Could I make a couple of holes in the tiles and screw the panel to a frame
behind and fix a rubber strip at the top for seal purposes or am I over
engineering something that
really is'nt needed?

Fix it with a couple of mirror screws and silicon joints instead of
grout.