Sherpa Van Telephone Service OO

This Sherpa Van dates from the 1970s in mid grey. The interior is black and ladders have been applied to the roof.  

With an unusual red, black and white triangular logo of an even more unusual Telephone Service and a strange number plate.

Scale 1:76 for OO

Add this van to your layout and create a scene from a British spy movie of 1977 - have you worked it out?  Last clue look at the end of the product code!