Right, I managed to get a look at the thing this weekend (at home in daylight for once!).
The clutch pedal arm is damp so I am pretty sure the leak is from the master cylinder, dribbling fluid down the pedal arm onto the floor rubber mat, which also shows signs of dampness immediately under the pedal. The master cylinder is pretty well dry and the pedal goes more or less striaght to the floor now and will not pump up pressure. I could not start it to see if I could get it into gear as the main battery is almost flat again
I couldn't be bothered to jump start it off the yellow top Optima as it seemed slightly pointless to leave it running parked at the roadside to charge the battery as it won't drive It jumpstarts easy enough off the other battery. I just wish I knew why the (fairly new) red top Optima keeps going down.
I think the best thing would be to have a replacement master cylinder and then look at refurbing the old one with new seals, which I may be able to do myself as I have done a brake master cylinder successfully in the past.
Les, would you be able to have a look at some stage. You would have to come out to me (I don't live in Highworth by the way ) as I wouldn't be able to get it to you without a clutch...... I could drop the keys round to yours one evening.
Cheers