As Doug says
It is a kit from T Gauge .
They have a Yellow and orange crane to reproduce .
got some time off this weekend so I have got the yellow version to do this time and I will now build it better as the cab clear parts seem to slide away from you and you have to glue seperetly in order to get it right.
Will place a seating figure in the cab on my second crane.
Hope they bring out more versions of other buildings to be built either in kit form or ready made?