By Joel Leaver Gavin and Stacey is set to return for a festive special later this year and one cast member has now confirmed that their character will be in the much anticipated episode. It was revealed last week that the BBC sitcom will return for its “finale” at Christmas. The most recent episode of the BAFTA-winning show aired back in 2019 and it ended on a cliffhanger with an unanswered marriage proposal. Following the news that the show is coming back, cast member Alison Steadman, 77, has confirmed that she’s set to reprise her role as Pam Shipman. The character is the mother of Gavin Shi…