There is a general arrangement of the loco in Brian Hollingsworth's book on LBSC with a couple of dimensions on.
LBSC designed Vera in 1951 (along with the similar Gert and Daisy) exclusively for Reeves and the design was never published in a magazine. Also there are no references to any completed models in the ME index.
So if Reeves are unable to help you with drawings the only chance would be someone with a second hand set they are willing to part with.
Brian Hollingsworth describes Vera as being 5" gauge but there are a few other misprints and mistakes in the book.
Edited By Nick Clarke 3 on 15/10/2021 08:55:52