English: Forth Railway Bridge. The railway between Throsk and Alloa was authorised in 1879 as a branch from the Caledonian Railway's South Alloa branch, the CR absorbed the line in 1884 and it was closed from 6 May 1968. The photograph is from the middle of the river, we are passing through where the swing span was, and shows the southern part of the bridge. This bridge, until the opening of the Forth Bridge at Queensferry, was the most downstream bridge on the Forth. Latterly it was a somewhat rickety affair with a 10mph speed restriction and was used by a shuttle service between Larbert and Alloa operated by a 4 wheel diesel railbus although, in earlier years, there had been through Glasgow - Perth services via the Devon Valley. The bridge, by the way, is not shown on the OS 1/50000 map (!) but is on the Admiralty Charts, fortunately.