Definitely CALYPSO ex SOUTHERN CROSS on Tilbury Landing Stage with MIKHAIL KALININ astern. Wondering if it was taken around the same time as this http://www.shipspotting.com/modules/myalbum/photo.php?lid=32363, in which case I somehow missed the WORCESTER being towed downstream on her final voyage.
If memory serves me right, Worcester was built as the Exmouth and was a fleet support vessel, thus never had any guns. No doubt, those wiser and with better memories than me will provide the full facts.
I always thought she was built as a school, and that the previous Worcester was ex naval.
I did my pre sea and phase 1 ONC on her in the early seventies, and remember trying to play snooker on one of the many snooker tables she had. As ships passed all the balls would roll around, made it very interesting! There was even a cadet who went boating in one of the tin lockers they supplied for ones gear (didn't get very far before it sank and he had to be pulled out of the water). But the main thing was waking up in a mist filled sleeping area, when the fog came into the ship through the lower decks and filled it.
The Captain (ex headmaster was a Capt Argles), I don't think he really understood the difference between the first trip cadets who had been to sea and then came back for the phase 1 and the school kids he used to teach. As a school the students had a tradition of walking around the mast, which was very quickly lost.