Believe me no-one wants to try and tackle a knife wielding suspect with a baton, at that point you're using defensive tactics and your partner will use their CS/PAVA to try and disable them.
Fortunately, in the UK, the vast majority of people with knives aren't actively homicidal at the point at which the police turn up.
Nightjack was amazing, the Times is in my permanent bad books for their nonsensical justification for outing him. He thoroughly deserved the Orwell prize that he won for his blogging.