We have an extendable wooden table available. It's 1560mm x 1000mm, and 2020mm x 1000mm when extended. It's solid, bare wood, and the top of it is a bit patchy, but if you were super keen you could sand it down and treat it. The top has a tendency to warp a bit, more so in the summer. We got it from Freecycle or Freegle many years ago, so this will be it's second time being re-used.
We've removed the legs, but it's still big (1560mm x 1000mm) and heavy so you'll need a suitable vehicle to collect it and be strong enough to help carry it. The legs need a 13mm spanner to attach them.
Collect from Lillington.