[DTV]

I don't believe it is. Much of it is funded through subscriptions and advertising rather than the licence fee.

The old World channel was not at all funded directly from the licence (though would have received some licence money indirectly due to usage fees by the NC). By virtue of it being one channel, the new World feed will arguably be part-funded by licence money, but there are complications - even the default versions of the World feed carry sponsored content and some adverts, which the BBC aren't allowed to broadcast in the UK.

They could arguably create an ad-free version of the World feed, but there just isn't enough demand relative to the effort. I doubt many UK viewers are even aware of there being a World feed to begin with, and even then, the two feeds shows exactly the same thing for the overwhelming majority of UK viewing hours.