If you use Google Earth historical imagery (slide bar in Google Earth), you may pick out C632 alongside at Chatham dockyard in 1960. 51deg 24min 16.16 sec. N & 0 deg 31min 53.13 sec E.
Also at later dates alongside at Denton Gravesend.

http://www.merchant-navy.net/gallery/showphoto.php?photo=26037&title=c-632&cat=774
The above link on the British Merchant Navy site shows a good photo of the C632 which illustrates the earlier comments that I made re the fwd mast stay, and monkey island access, when comparing photos of C632 & C653.There are several photos out there with the vsl name shown on the hull(so as to allow for positive id) which illustrate the comments made. Other differences are that the vertical stanchions at the ship's side on maindeck only have horizontal wires, whereas the C653 has railings that are full fabricated from pipe for both the vertical stanchions and horizontals.