I was hoping to find it was just a fluid filled cyst or something but it is quite hard, perhaps a haematoma. It will definitely need removing but VET is waiting till he gets results back from biopsy to see how much margin he needs when he takes it out in case it is something more nasty
Fingers crossed we will know soon.
Bless him, Woofie was fantastic, hardly a murmur as the VET had two attempts to get a sample
Cost £90 as well!