It is outside the fence therefore action will lie with the civil police.
As the controller, if he considers the approach to be fouled then he should not clear the aircraft to land or to instruct the aircraft to land long. It used to be the case that aircraft would be instructed to land long if the threshold barrier had not been de-riged.
Clearly, if the FJ cannot land long then the onus transfers to the pilot to go around and for the controller to call civpol.
Coningsby has the same problem only 575 feet to the 25 numbers.