Ken Harrison, managing director of the Southward-based F1, said: "We are obviously very pleased to be working on such a title and with such a professional and friendly team at Slimming World.

"F1 has increased its sales by 23% last year and will be looking to continue that growth this year with quite a few pitches and projects ongoing."

The company said it was "very impressed" with the quality of F1's work and its customer service.