I'm actually pretty sure Bradford statement about the company change not changing employment conditions is actually incorrect but that will come out in the wash. If any of his conditions changes, like working conditions or wages it's grounds for constructive dismissal and he would be free of his contract if he chooses it. The only issue is if he has taken wages while in understanding of those changes for a prolonged period which demonstrates agreement to these conditions (my understanding).
Most Bradford can get is lost of earnings which can't be demonstrated here in my opinion.
In short, reckon Bradford will make some noise about it, then employment solicitors will get involved, they try to claim loss of earnings, Carvel will decline and then it will get dropped. Happens all time, it's almost templated.