Extraordinary rendition is still a thing, though; the US has done this several times. Now, granted, the US is a freer country than the UK is so that doesn't us

Extraordinary rendition is still a thing, though; the US has done this several times. Now, granted, the US is a freer country than the UK is so that doesn't usually matter all that much, but all the US would need to do to nullify its 1A would be to simply permit the UK to enforce its claims of extraterritoriality in US-friendly airspace. What speech they might be permitted to prosecute would naturally change based on administration.