Tom Barry gurgled happily, sounding much like
they were saying:

While that may be technically true, to what extent should an employment
contract override your basic legal right to defend yourself using a
level of force that seems reasonable to you in the light of a perceived
threat?

It doesn't. Which is why he's not been prosecuted for assault, presumably.

Personally, if the police and CPS don't prosecute him, they presumably
think his actions were reasonable, so why don't LUL?

Is everything which doesn't result in prosecution by the CPS appropriate
behaviour in your employment?