Lined up in Swindon Station about 1975 are the prototype HST and APT.
Apparently the prototype APT was tried out on the Great Western Main Line, and achieved a new British railway speed record on 10 August 1975 when it hit 152.3 mph (245.1 km/h) whilst on test with the Western Region between Swindon and Reading.
(More info on the APT at https://en.wikipedia.org/wiki/British_Rail_APT-E)
Gallery of pictures from the Archive.
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)
©Calyx Picture Agency ARCHIVE
The prototype HST and APT locomotives in Swindon Station (about 1975)