This is fantastic! My father was on the Vandyck. He joined the Royal Navy in 1938 and served until 1960 when I was born. He was a Sick Berth Attendant on the Vandyck, and spent the majority of the rest of the war in Marlag und Milag Nord at Westertimke.
As far as I know, the Vandyck missed her rendezvous and sailed too far North, ending up on the other side of the peninsula to Narvik, where she was supposed to be taking part in the evacuation of troops withdrawing from Norway. In fact, two destroyers were dispatched to look for her when she failed to turn up. I believe she was dive-bombed and caught fire on the 9th June 1940, was abandoned on the 10th and sank either later that day or the following day. The evacuations from Narvik had pretty much completed by the 8th June.
The crew were taken prisoner and most, I believe, ended up initially at Stalag X-B at Sandbostel, which later acquired a much darker reputation as a concentration camp in all but name.
During 1941-1942, some of the prisoners there were transferred to (and indeed, helped to build) Marlag und Milag Nord at Westertimke, about 15-20 miles away.
In late 1942, all the ratings from M&MN were transferred to Stalag VIII-B at Lamsdorf, with the NCOs and officers remaining. I believe my father by this time had been made a temporary Leading Sick Berth Attendant, and stayed at M&MN, and so was probably one of the lucky ones, as life at Lamsdorf seems to have been much harder.