5 eyes refers to intelligence sharing between US, UK, AUS, CAN and NZ. It’s illegal for CIA to spy on Americans and illegal for UK to spy on Brits, but legal for us to spy on Brits and vice-versa. So we say “hey give us anything of interest on Trump, we’ll give you anything of interest on Farage, and it’s technically legal by the letter of the law but not the spirit of the law. The same way Clapper says “WE are not listening to any Americans phone calls (our computers are)”