Got an ignition module/amp and radio suppressor both coming today/tomorrow
Brand new at a cost of £21 all in so not bad for piece of mind

And too Rob no the tacho was not working either when I purchased, bought it to restore it back to its former glory... weren't expecting to be taking the dash out and chasing wires the engine itself it in mint condition, apart from this electrical problem, just want it running so I can drive it to paint shop