Posted: 23/04/2017 at 14:37
I'd take the whole branch out, right back to the trunk to be safe. That branch is a bit low anyway. Cut it just level with the end of the collar, like in the image on this page:
If that were my tree, I'd also remove the 2nd trunk growing from the base as it could be from the rootstock rather than from the grafted variety and will take over eventually. If the bark on the 2nd trunk looks different to the main one or the blossom is different then that would be a certainty.