Again this is a company to company sale and so no VAT actually changes hands
Unless Denmark really has a zero VAT rate between two Danish VAT registered bodies, there is a bit more to this, because within the UK one UK company selling to another does have to invoice VAT.
Having a zero VAT rate between two VAT registered companies is of course hugely sensible and totally obvious, but the UK C&E have never had the imagination to do that.
Interesting info, 3Y. I have always known that one can get a zero VAT rate on a European-made plane but never did find out how this is done.