t43562,
More good links, thanks.
The air-to-air is not from a UAV, it's from a R44 with a real pilot and a real camera operator. They were working for Dean Arnett who is producing the official video history. I ordered mine months ago!
deanarnett.com ? The Story of Airlander
Cardington happens to be inside a small danger area, D206, which is active H24 Monday to Friday so they (and we) need permission to operate in it.
Cheers
Joe