Update.............................
I've slackened off the spring to allow a little gap between the coils, then checked whether I could still engage all gears.
I am pleased to say that all gears engaged very smoothly and I actually found the pressure needed to push in the clutch pedal was a lot easier. There is now about 10-12mm of free play on the top of the pedal.
Thanks for all the input guys. I'll keep an eye on this issue and get back with any updates.
Here is a piccy of how it is now.
