1975
May
5th. Wootten Bassett Junction to Stoke Gifford line closed for relaying prior to introduction of HSTs.
September
St Philips Marsh HST Depot opened at a cost of £1.5 million. It was built on the site of former cattle pens.
October
6th. Wootten Bassett Junction to Stoke Gifford line reopens after track relaying in connection with the introduction of HSTs.