Difficult to say whether the drips were from the bleeding attempts/brake cleaner clean up, a leaking breather or from the slave. So currently have some cardboard under the gearbox and operating the clutch to see if any drips appear. Currently have clutch pedal feel back and gears going in ok, but need to see if that deteriorates the more it is used. Now waiting to see whether if goes soft overnight again. No obvious fluid loss from operating the clutch currently, but slave cylinder is probably next on the list given I think I have finally managed to bleed the system through using the reverse bleeding approach to get in a position with no air in there now (hopefully).