Cheers Mate
I ended up removing the pack and testing it with a digial meter, found that number 1 was at 12-13 Ohms and the rest were at 1.0. Ordered a new set from paddockspares.com for £135 plus dreaded.
If anyone out there has a problem with a faulty coil let me know, I have three good replacements that work fine and I'm not greedy.
Cheers
Nige