Hi Dave
Here's one, looks as if its a modified carrier rather than a special one. Hope this helps.
The WD No. on this is a wee bit of a mistery. If it is 17641 it should be a Valentine MkII, so it must be 17641? which would make it a Canadian made UC MkI. However the breakdown of the Contract doesn't show 17641? It jumps from 176404 to 176624. But hey there it is in the photograph so who needs any more proof than that!!
Nigel