Everyone is just assuming that Corbyn and Chakrabarti had their arms twisted. But, one, if they were vulnerable to that, don't you think it would have been done

Everyone is just assuming that Corbyn and Chakrabarti had their arms twisted. But, one, if they were vulnerable to that, don't you think it would have been done before in the many other times they've been nuisances to the state? And two, I don't believe that an arm-twist exists that would get them both to shut up and smile, rather than sing out and damn the consequences. Nor is it plausible to stifle such a public disclosure these days. So perhaps they were persuaded by actual persuasion, rather than a gun to the head? Such as for example, somebody had a quiet word with them about The Aliens.