My brother, who works 12 hrs/wk for a large national retail chain in the warehouse, recently turned up for work at his normal time and was intercepted before he could clock in. He was asked to come back 3 hrs later because the delivery lorry was late. He doesn’t have a contract, though he keeps asking, but I suspect it would say he works from when he clocks in. Morally, it seems wrong, but is it legal not to pay you anything ?

Thanks.
Peter D