Pete / H.
Google
Operation Dynamo.
It's a 45 minute tour, and after queuing, you seem to be rushed through for the first 20 minutes, you don't get time to take it all in, and can't take photos, after that you can explore the rest by yourself and take photos, which was great. I think the tour guides should keep there thoughts to themselves, as was told things that weren't True.
It would be a far better experience if they done an Audio Guided tour.
My advice is to visit when it's quiet, when the kids are in school Time.