Adrian Dunbar pictured in January 2020Line Of Duty star Adrian Dunbar is warning fans of the hit police drama to brace themselves for an update on the show’s future.Three years have passed since the award-winning BBC show’s divisive season six finale, with speculation about whether it’ll be back for a seventh run having been rife ever since.Rumours went into overdrive earlier this month, when the core cast met up with the show’s creator,