I think British politicians are particularly poor at sticking up for UK interests. One sniff of a competitor's cheque book and they are like fawning poodles rolling over for their tummies to be tickled. Enriching themselves even at the national expense.
I wrote to 2 MPs complaining about the Arm Holdings sell out and never even got a reply !
Surely it is a private matter between the owners of ARM and the purchasers? It would therefore be ultra vires and potentially commercially damaging for politicians to intervene.