Pardon my intrusion, but which BR diagram(s) are these BOGIE BOLSTER A wagons?
The only such wagons listed in the BR Lot / Diagram lists that I can find are 1/487 BOGIE BOLSTER A , of which there were precisely five, converted from ex-GWR diagram C21 RECTANK wagons, and numbered W162000 - 162004.
Other BOGIE BOLSTER A wagons were ex-GWR diagrams J25 & J30 MACAW H, and J31 which were also converted from C21 RECTANK wagons.
Now it may well be that I have overlooked the obvious, but I am nonetheless intrigued.
Regards,
John Isherwood,
Cambridge Custom Transfers.
https://www.cctrans.org.uk/products.htm