Thanks for the photo, which doesn't appear in C E Faulkner's collection. Here is the text from his field-notes, full of abbreviations:
10. Uffington Wharf, Bridge, SU300898;
Visited:- 7.8.60; 10.9.60; 22.9.60; 13.5.61.
Access:- from Uffington.
Photograph Nos.:- 358 : 360.
Observation:- Comparatively well-preserved spot. Traces remain of parapets of masonry Br. and distinct road bump. Embanking again in evidence:- to line E. for somd distance, but filling has taken places, and to W, where line and bank are very open and visible. NW curve to Rly. is very marked. Wharf Cottage remains apparently in inhabited condition; there is an ugly pre-fabricated dwelling on wharf-canal site. (13.5.61) walked about 400yd E. str. well defined line in high embankt. app 15'. quite dry & clear over distance, then dense growth and line v. narrow. Also wkd. abt. 300 yd. W, but more overgrowth, embankt. not so high: line further to Rly curve, v. difficult.
Although C E Faulkner's set of slides does have some missing examples, in this case both are accounted-for. No. 358 is of the canal embankment, looking east from the wharf site, while 360 is of the wharf; both were taken on his last recorded visit, 13th May 1961. Comparing the two of the wharf cottage, I guess that the RCHS photo is more recent; the TV aerial seems to have been relocated from the chimney-breast to a free-standing mast behind the house, while the wall in the foreground has been rebuilt.