One thing worth noting is that the payment is being made through the Bus Service Operators Grant (BSOG) system, so any operator who only runs local authority tendered routes where the authority is paid the BSOG will not have an account. That confused DfT, but they have now worked out how to pay these operators for the £2 scheme, via the local authority. This means that many operators who will be taking part won't be showing on the list. In the case of my area this makes it look like a wide swathe of the north of the area won't be able to get £2 capped fares, when in fact they will.
Another point missing from the Government information is that students travelling to school who pay a fare aren't eligible for capped fares. What does this mean? No one seems to know, at the moment. But, a bus which passes a school and carries students along with everyone else would seem to be part of the scheme, whereas a route aimed purely at school traffic would not be. What happens if it is a normal bus route but with a single journey in each direction extended to a school, no one at DfT can tell us. Nor do they know whether college routes are included or excluded.