No, but I'm British. It doesn't help that the hyphen in "block-book" disappeared somewhere along the line in submission. That is somewhat idiomatic British eng

No, but I'm British. It doesn't help that the hyphen in "block-book" disappeared somewhere along the line in submission. That is somewhat idiomatic British english. And there's another British idiom here ("learner drivers"). But this (problem X as pattern Y) is a common British newspaper headline construction (pattern Y is suggested to be responsible for the context in which problem X is occurring). It is at least a mostly full sentence, though (if in note-form). US headline constructions often feel weird to us because they aren't. I imagine the US form of this headline might read something like: "Brokers dominate driving test bookings, applicants driven to black market"