I hope Reaction Engines is secure against industrial espionage!
I hope the UK and European authorities are providing Reaction Engines with the required level of security against industrial and defence espionage.
You could bet that there a number private and government / state actors (especially from non-democratic states, you know the usual suspects) that must be keen to get their hands on this technology without paying for the Intellectual Property!
At a time when the UK and European economies are facing growth problems, it would be foolish not to protect such assets and keep the UK and Europe competitive in world market.