Virtually got everything done today.

Only thing left is filling the screw holes, sanding them and the MDF, another coat of primer and then the top coat which will also be in Deep Aubergine.
Floating wall up with mounting bracket in place and cable hole cut. Speaker brackets for L and R attached.

Test mount of LCD - it stayed in place!!!

Mounting bracket support inside the floating wall. Set in place with no nails and 18 plasterboard fixings, it's not going anywhere!!!

TV and speakers in place. Unfortunately the bracket can be seen when standing, but from the viewing position it's hidden. Without taking a hacksaw to it, it'll stay like that.

Sky cable now through the wall. Second one runs upstairs.

The rest of the cables and the mess. The cables from the TV and speakers run through some trunking behind the radiator and then along the wall.

Finally, all in place and looking good. The shelf on the bottom will be painted gloss white.

The AV gear all neatly stacked, and cables hidden behind.

The whole set up from the viewing position.

A shot with all of it in the dark - sorry no tripod.
Will be looking to do the filling and painting during the week, work depending, but will post the final pics when it's all done.
Many thanks to Torn for his help, advice and time. This would have remained an idea in my head without him.
Thanks for your interest, any questions please ask.
Greg