Comment by pjc50

RR are only alive because they're strategically important enough to warrant being bailed out several times. They were nationalised in the 70s, and looks like they're in trouble again: https://bdaily.co.uk/articles/2018/06/14/government-has-to-i...

ARM are one of the few fully homegrown tech success stories, along with Racal/Vodafone. Unfortunately the UK has a history of "technologically successful but economically unviable" projects, and isn't able to take advantage of the startup logic where investors cover the losses.