Euro-pork
The A400M - heck, some of us even recall when it was known as the Fictional Large Aircraft - is one huge heap of Euro-pork. The best thing for the UK would be for Airbus to bail on the project, MoD to recover liquidated damages on their non-delivery (assuming some genius managed to include them in the contract), and then to go shopping for a handful more C-17 and C-130J.
It's not very likely, is it?