Popped in to see Tony at Select Marine today and it's fixed!
Barrus have supplied a new compressor under warranty as a good will gesture.
The injectors have been back flushed, all the air hoses cleaned out and new oil filters fitted.
Tony did a sterling job of getting it all back together, I can't recommend Select Marine highly enough!
All I paid for was the labour - Bargain!
Thanks for all your comments and advice.
It looks like i'll get to see this season out after all!