That power was never removed. Operationally they stopped doing it until they had worked out a way to do it safely without killing the rider or any pedestrians. It is now a specific part of Police Driver training. The same tactic would work with e-motorcycles except that unlike their petrol equivalents, they are much, much faster and more responsive. No gears to change and all the speed available straight away. Plus far more riders without any safety clothing.It came down rapidly when officers were given the power to ram them. With or without a helmet on.