They may be only three-years-old but Norfolk twins Caitlin and Rosanna Brett are already hotly in demand as young actresses. The girls were just babies when they were first asked to play actress Caroline Quentin's youngest daughter in the ITV crime drama Blue Murder.

They may be only three years old, but Norfolk identical twins Caitlin and Rosanna Brett are already hotly in demand as young actresses.

The girls were just babies when they were first asked to play actress Caroline Quentin's youngest daughter in the ITV crime drama Blue Murder.

But after the girls and their family moved from Bolton in Lancashire to Bressingham, near Diss, last summer, their mum Julia was amazed to get a call in March from Granada insisting the girls return to film the new series, which starts tonight at 9pm.

In the show, Caroline Quentin plays Det Chief Insp Janine Lewis, a single mother-of-four, who struggles to balance her professional and personal responsibilities. The girls jointly play her youngest daughter Charlotte.

Mrs Brett, a teacher at Diss Church Junior School, took the girls to Didsbury in Manchester, where the show is filmed, and said that production staff managed to cram the scenes involving her daughters into a few days.

Mrs Brett, who also has a son Finlay, eight, said her children were with a casting agency in Warrington when Granada was looking for girls to play the part of Charlotte.

“Granada wanted identical twin girls with brown hair,” she said. “Lots of agencies sent in photos and Caitlin and Rosanna were chosen.”

Mrs Brett, whose husband John works at Full Circle Engineering at Banham, said she would leave it up to the girls to decide if they wanted to continue acting.