The idiom "to double to on sth" in the sense of "continuing to do something in an even more determined way than before" is mentioned in the Cambridge Dictionary. However, personally, I've heard this exclusively in American English. Thus my question: is this phrase also commonly used in British English or rather just in American English? And if the latter is true, what would be a British equivalent?
There are no relevant instances of double down in the British National Corpus and 491 instances in the Corpus of Contemporary American English, so it seem likely that this phrase is not commonly used in British English.