Great ideas guys.
Favourite now is indeed an Ikea beech or oak worktop plus battens and leg. Fitting a nice ply to a frame is a sound idea but not as simple as the former. Needs to be sturdy enough to hold 2 or 3 24″ TFTs, a printer and keyboard shelf so I guess proper worktop legs have the advantage over something like breakfast bar legs (which are a fair bit cheaper)? Edge trimmer or router for the finish.
Not sure I’ll get 2.5m+ up the stairs so maybe some kind of strap/hoist and in through the window job will be required.
There’s a sawmill a few miles away so I’ll give them a shout in the morning.
Cheers all