Back from the vets, all ok it was a scab!
I blame the OH
Vet did locate the chip on Jake by hand as well after scanning first to make sure it was properly in place, very relieved!
Jake did have a couple of scabs on his shoulder which vet pulled off, one was shaped oblong and the vet even scanned it initially to check it wasn't the chip embedded!
Vet said to keep an eye on how many scabs and how often he gets them as a couple is ok but if more frequent could possibly indicate a skin condition. Strange he had a couple at the moment as he has only just started off lead walks/rambles again after being neutered last month
I guess it only takes the one wild walk with a cocker to pick up a couple of minor skin wounds though...