Hmmm.... buying foreign...
Apart from Challenger II, and Altberg boots, and very possibly the very current Sa80A2 with all the new attachments, I can't think of a single ship, vehicle, aircraft or item of equipment that we can produce that is better than something made abroad for less money. I'm sure some will disagree, and give me a couple of examples I may even agree with, but its still a pretty accurate generalisation. It comes down to making this budget go further, and buying off the shelf helps with that.
I am fully aware I will mention that doing this and letting British Defense inductry die is out of the question, both from a political standpoint and from a strategic standpoint. It just depresses me that we have sunk so low.