They’ve swapped Christmas – again. Can Hayley and James’ relationship survive another turbulent family Christmas or has their future together gone off-piste?!

Students Hayley and James are young and in love. After saying goodbye for Christmas at a London train station, they both make the same mad split-second decision to swap trains…

Nothing delights Emma more than meddling in the love lives of others. But when she takes protege Harriet Smith under her wing, her plans can only end in disaster…

Three people, three extraordinary stories. All lived out within a hundred London streets.