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Murphy, 49, plays Thomas Tommy Shelby, a calculating and ruthless leader of the Shelby crime family in Birmingham

Watch the trailer for Peaky Blinders season 5 above and find out the answer below

Laughing at the memory, Helen admitted the situation behind the scenes was worse than they thought

Politician and leader Tommy Shelby (played by Cillian Murphy) in particular seems to inhale smoke more than anyone else, but now actress Helen McCrory, who plays the formidable Aunt Polly in the series, has revealed the truth, and it will shock many fans of the period favourite

The TV drama, which started in 2013, has an impressive cast list including Irish actor Cillian Murphy who confessed to learning the Birmingham accent in an unusual way