The plans I have actually have details of the UC legs and panel lines some of which are only on production Vanguards and some only on the prototype. The plans have details for the Vickers original livery and the early BEA Red Square as they date from before the second Vickers and large BEA tail Square.

They have some measurements on the plans.

I couldn’t scan the whole lot in so they are in bits but if you want I can send them to you as in conjunction with your other info and visit might give you enough.

Garry