October?
Sounds like another pol kicking the can down the road.
October 31st is the earliest date that the UK can leave without EU approval at this point. If the new Prime Minister (whether its Johnson or somebody else) can get an agreement with Parliament and then with the EU before then, they can certainly leave earlier, but all Johnson is saying here is that whether that happens or not, it would be his intention as Prime Minister to leave on 31st October and he doesn’t need any approval or permission to make that happen - it’s already agreed that that is the date unless an earlier or later one is decided on later.