Final update: it's been stripped this morning. All the parts came off fine with the exception of the seatpost (stuck), RH crank (thread stripped) and rear brake (utterly seized and I bent an allen key trying to remove it). The frame isn't holed but badly rusted and I don't trust it.
So ... I've a LH crank (!), 9 speed Campag Mirage shifters and F/R derailleurs, bars, front unnamed brake plus a pair of Mavic MA3 wheels with new-ish tyres and a 9-speed Campag cassette. Wheels need re-greasing and new skewers but otherwise are basically OK. All for £30. Now what to do with them ...
If anyone does want the frame please ask.