I think this is 66951, operating 067B (Stoke Gifford to Eastleigh East Yard) on 2018-04-23, seen here near Claverton, Bath. The photographer is just off the towpath of the Kennet and Avon Canal.
Road-hog123
CC BY 2.0
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/72339533@N03/26798047207/">https://www.flickr.com/photos/72339533@N03/26798047207/</a>