Location is Taunton, going towards London/Bristol. The rear three quarters group on flickr helped me to find this:this isnt a very good photo but it does show the rake
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Taunton: shunting a defective coach from an ECS from West Country to Bristol Malago Vale 06/07/1984. Rescanned.
www.flickr.com
Taunton: shunting a defective coach from an ECS from West Country to Bristol Malago Vale 06/07/1984.
The rolling stock looks like it is a standard mid-70s Western Region aircon rake with First Class behind the loco then the restaurant car. There are likely to be more Second Class behind the photographer.