Yes, it comes from the local police budget, so those local police forces have to find the resources to maintain those programs.
Again, one of the very real difficulties in the U.K. is the fact that this leads to a lot of duplication of effort. You see witnesses being moved from one part of the country to another, and rather than being handed over from one force to another, it's the force that is moving the witness that will establish them in the new community.
There's been a lot of discussion about whether the process could be made more efficient, through either a national program or regional programs within the U.K., rather than just relying on these local ad hoc arrangements.