ITV has announced it is recommissioning second series of four new dramas – Vera, Monroe, Scott & Bailey and Case Sensitive.

ITV says it’s recognition of their success after capturing eight of the top 10 most watched new dramas in 2011.

Vera, starring Brenda Blethyn as a shabby detective chief inspector, averaged 6.6m viewers with a peak episode of 6.8m. The new series will consist of four two-hour episodes.

Scott & Bailey featured Suranne Jones and Lesley Sharp as two mismatched detectives in Manchester and ITV will screen eight new episodes in 2012.

Monroe, starring James Nesbitt as neurosurgeon Gabriel Monroe, will film six new episodes in 2012. The debut series captured an average 5.7m viewers.

Crime thriller Case Sensitive starred Olivia Williams and Darren Boyd and averaged 6m viewers in its debut. It will return with two new episodes in 2012.

ITV’s Director of Drama Commissioning Laura Mackie said: “We couldn’t be more delighted with the success of Vera, Case Sensitive, Monroe and Scott & Bailey.  It’s terrific to think we are commissioning the most watched and appreciated original dramas for the ITV1 audience.”