Hornby R3991SS - BR A3 Class 'Flying Scotsman' with Steam Generator, Diecast Footplate & Flickering Firebox BR, A3 Class, 'Flying Scotsman' With Steam Generator, Diecast Footplate & Flickering Firebox - Era 4 The exceptional ‘Flying Scotsman’ underwent several renumbering, from No. 103 by LNER after being rebuilt to A3 Class specification in 1947 to No. 60103 by BR after the nationalisation of the railways in Britain.