Line Of Duty star Martin Compston has admitted there is "nothing immediate" in the pipeline when it comes to a new series. The sixth season of writer Jed Mercurio's BBC police drama aired last year and there has been much talk about whether fans will get another instalment from AC-12. Compston - who stars as DI Steve Arnott in the hit show - shared an update as he appeared on Good Morning Britain, telling viewers there was nothing set in stone yet.