Just so everyone is clear what happened here;
Waitrose, a company that makes many millions in profits, was happy to let this young man work in their stores for several years without being paid.
The moment that he asks to be paid for his time, they refuse to let him come back.
This wasn't a "placement", or about helping him to get some "work experience", this was a large company taking advantage of a young man to use him as free labour, and the moment he wasn't free anymore, they dumped him.
This isn't inclusivity, this is blatant exploitation.