I called here this afternoon, the place looks to have closed.
Doncaster NR Ten Pound Walk Depot - Projects, Worksites and Locations - Forum
Doncaster NR Ten Pound Walk Depot
I think I put something on site some while back to say they had moved to Marshgate. Last time I was up that way was 2nd Feb this year so could have been then.
The offices were being cleared of furniture at the time.