I'm very pleased with how this has turned out so thought I would share it on the forums.
I ordered one of these from MFI :
http://www.mfi.co.uk/mfi/FinalProduc...=*&SKU=SRM1131
I included an extra plinth running front to back along the base to halve the span as the TV is heavy. (36" Tosh about 85kg) cut back from the front so it can't be seen.
I got a B&W CC6 S2 centre speaker that just fits on the shelf in the middle. I moved the shelf up so the speaker is as near to the screen as possible. I then made up a frame from softwood and covered in in dark brown speaker fabric, fitted some magnetic door stops (like those that hold kitchen doors closed) to hold the cover in place.
I fitted a (supplied) panel to the back of the sideboard behind the centre area to provide some cross-bracing and left the backs off the left and right so the hardware is well ventilated.
The sideboard actually comes with the brused steel handles.
I've tidied up the cables since the photo was taken. Cost about £250 all in.
Photo attached