4T on Gunauction

[limpetmine]

That was one thing I noticed. The scope serial on the mount looks postwar. Canadian-ish, if that's a word.
Serials were stamped during the war. The side wall serial looks like the BSA FTR postwar program font to me.

What about the s/n on the bracket? It looks to be engraved rather than stamped and the size and font appear to be identical to the number on the rifle. It's also not in the usual place one would expect it to be on a genuine Brit set up.