Two entries in recent months have shown pictures of a "Wickham" trolley undergoing restoration:
http://beamishtransport.blogspot.co.uk/2012/06/general-transport-industry-news-roundup.html (13 June 2012)
http://beamishtransport.blogspot.co.uk/2012/07/general-news-roundup-into-july.html (7 July)
I have contacted the museum who unfortunately cannot shed any light on the identity of this trolley.
Any help would be very much appreciated