The Matchbox #60 Leyland Site Hut Truck was first released in 1966. It wore black plastic wheels from 1966 to 1969 and Superfast wheels from 1970 to 1971, and the bed of the truck carries a yellow plastic construction site hut with a removable green roof. I have found this truck before, but never with an intact site hut. This example is another of my Wichita eBay scores.
The Matchbox Leyland Site Hut Truck features a nicely detailed representation of the Leyland Ergomatic cab.
Matchbox | 1966 | #60 | Leyland Site Hut Truck | blue, yellow plastic site hut with green plastic roof, blue tint windows, chrome plastic grille and base | England | black plastic wheels
The Race Case MBX 