Colin and Howie are constantly feuding best friends who marry sisters Jackie and Pauline, making them into brothers-in-law. Can their relationships survive their feuding as it seems they will not stop and do everything to outdo each other?

Robson Green and Mark Benton co-star in Christmas Lights, a one-off comedy drama for ITV1 centred on two lifelong friends who have always competed with each other. The festive season brings on new challenges and takes their rivalry to extremes resulting in the two friends forgetting what Christmas is really about. Can anything bring them to their senses?