Just got Sally back from the garage.
She was making a nasty crunching whirring noise when I brought the clutch up which would go away on reaching the bite. Turned out to be a disintegrated spigot bush. It was only a couple of quid for the part but needed the gearbox to come out to replace it...Ouch!
Anyway the gear change feels much nicer now and it could have been worse...she might have needed a new box.