One of which was the rev counter not working. Went to the extent of swapping clocks etc to no avail tracing wiring back as had a safc fitted but everything seemed fine.
Swapped the ECU over today and the car ran like a completely different animal sounded loads better and the rev counter is working fine! Had a hunch about the ECU hence why I got another.
I haven't heard of many having to swap the ECU for this type of issue so thought it would be worth posting up.