There was a program on TVO, (Channel 2, Toronto) tonight , Oct 11, called "Coast". It's originally a BBC program so might be available through their website also.
This episode was the coast of Ireland from Dublin to Londonderry.
Why I'm mentioning it here is because the last 5 or 10 minutes of the program the host was interviewing a woman who was a WREN at the end of WWII and was sent down to the docks to film the U-boat fleet as it came in to surrender at the end of the war. She showed photographs of the boats coming in, and of at least one U-boat commander as he tried (unsuccessfully) to shake the hand of the hand of the senior British naval officer.
They also showed some short videos of the boats coming in and then the end of the boats as they were used for target practice by the RCN and RAF, and the last second of the boats with cannon fire, aerial depth charges and naval artillery sending them to the bottom.
There were a few good shots of typical Type VII's, and you could get a good feel of their size with the crew moving about on deck.
It might be worth it for anybody interested to try and find this show online.