Don't think it has been mentioned here before but there are two Mini 44 trolleys and two trailers at the west end of Carnforth WCRC yard. IDs unknown.
Carnforth WCRC Mini Trolleys - On-Track Machines - Forum
Carnforth WCRC Mini Trolleys
I'm told one has been previously identified as 901106 so the collection here may be ex Stockport... we're making enquiries.
I think there is a third trolley that I wouldn't have been able to see from my vantage point.
Strong candidates therefore seem to be
901106
901129
901136
011579
011583
011586
011631
Passed WCRC on the train today and think there were four trolleys and 2/3 trailers. Could be more as all in a heap and hard to be certain.