Anything below the 2000p range is an absolute steal. With IOT, Servers & Apple likely shifting wholesale (save Mac Pros) to ARM in the medium term, I wouldn't have been surprised to see their price hit £30-35 in 3-4 years, especially with weak Sterling and most of their revenue being $ based.

Don't believe for a minute that they'll "double jobs at the UK operation".

ARM's an IP licensing company ... Softbank will milk it for a bit, then sell it to a Japanese tech company for more than twice the price, who will offshore almost everything back to Japan eventually.