Spoke to techneopro who quoted me £20-£30 repiar which is fair enough as a repairers with no contactural obligations etc.
Also spoke to B70 who said...
"Our wetsuits have a two year warranty. I will ask a colleague to inspect your suit, if he thinks it is a wetsuit fault then we will replace the suit. If he thinks it is wear and tear then we will cover this under warranty."
Dropped it off with them in bath a couple of Friday's ago and it just arrived all patches/repaired... from techneopro!

Well done B70! leaving aside why on earth it split in the first place

didds