So it's ultra intelligence gathered from breaking enigma messages.

Your Reds messages, and they would then transmit it via wireless, out to alec commands and even two units attached to commanders in the field with First, which itself is incredibly special.

We are not aware of any other footage of Bletchley Park or any of its associative sites from Mobile Teoh Atal Everything Bletchley Park was doing and everything that went on at the site associated with Leslie was completely secret.

And so it's very, very rare even to have photographs, and that until this point we were completely unaware that there was any existing film footage to actually see those young people, as they were at the time.

Just relaxing, having fun, talking to each other really just makes it so much more impactful, I think, particularly watching it right now when quite a few of us are under lock down and under quite a lot of restrictions of the moment, perhaps helps us empathize a little better with the situation that those young people find themselves in World War Two.

The work they were doing was completely secret.

Nobody was allowed to talk about it.

They weren't allowed to share details, even with their nearest and dearest, until they really, quite recently because they were under the bounds of the Official Secrets Act and, of course, being young and working on something secret being watering with all of the attention that that implies, I think it is something that could really resonate with people today.