BAE have built, tested, flown and deployed abroard their UCAV demonstrator.The question has been asked "Why isn't the UK joining other European nations to develop UCAVs"
My belief is that it has a lot to do with the sharing of US stealth technology research with the UK, albeit limited, I imagine. The UK would probably not be allowed to make use of the research in a European collaboration because the US would most likely want the research to be kept secret. If the UK went it alone, then this would not be a factor. The downside could perhaps be that this would also implicate the possibility of exports of the new UCAV.
I think, that since UCAVs are in their first generation (It will be the UK's and other European country's first UCAV for that matter), it is important for the UK to go it alone to maintain the ability to great and build innnovative designs.
Neuron - it's a flight of fancy on a piece of A4.