There is absolutely no incentive whatsoever for a newly qualified GP to join a small 2/3 partner surgery. Often the income is not great and the risks too many for it to be worthwhile. There is a constant battle not to be left “last one standing” and until this jdentifed and managed these smaller surgeries will continue to close.
The days where there were multiple applications for partnership has long gone and the cynic in me suggests that this has been done with a long term government plan in mind to decimate small/medium practice. There is no other viable explanation.