I think it possible that there is a missing name from the list of miners killed at Cossall. My near-neighbour, Billy Jepson, age 26, of Blake Street, was killed in the late thirties. The story circulated locally was that he was caught between two trucks.
It may be that he was employed at some other mine, but generally the Blake Street men went to Cossall.
I know about this as I was a child at the time and living on the same street -- next door to the Oldknow family and Mrs Oldknow was my babysitter. You have Sam Oldknow on the list at Mill Street. One assumes that the widow and kids moved to Blake Street between his death and my arrival next door in 1934.
The name on Billy's birth certificate would probably have been William.
See also Alan Beales