I decided to put up with the occasional knock rather than spend lots on gearbox parts.
Last month I replaced to coil pack (from previous posters advise) and since then it has been perfect, even running on regular grade petrol.
For anyone who has similar knocking and banging when pulling away try this first... It only cost me £25.00 from Ebay.
Car seems to be livelier and the gear change smoother too.
This really is EXCELLENT NEWS!!!
Congratulations, and best of luck in your future endeavors.