The modern computer was invented in Britain, we have ARM, designers of the most popular chip architecture in the world and make things like Raspberry Pi. We've got the ability but not the ambition. The attitude of "we'll design the chips, others can do the scary bit of building them"/"we'll publish the paper and others can monetize it"/"We'll make a fun little toy for research, but we'll let the americans make the commercial version" attitude is absolutely endemic here.