In the common law legal system, the peremptory pleas (pleas in bar), are pleas which set out special reasons for which a trial cannot go ahead. They are the plea of autrefois convict, the plea of autrefois acquit, and the plea of pardon.

English law apparently provides an additional preremptory plea of "special liability to repair a road or bridge", according to the Oxford Dictionary of Law -- what is this plea?