Teen Mom UK (the British version of the American reality show Teen Mom ) is back for a new series. There are some changes for Series 4 since mums Megan Salmon-Ferrari and Mia Boardman are taking a break and new girl Shannon has joined. Megan is taking a break to focus on herself and some personal projects, while Mia is taking time out to focus on her new relationship and daughter Marliya. Megan appears in the first episode of the new series and reveals that she has split from boyfriend Dylan (father of McKenzie, 2 and Dulcie Mae, 1. During previous series we saw her struggling with her relationship with Dylan, who she took back after he cheated on her with her best friend, and dealing with depression. Mia also had a difficult relationship with her ex Manley and they had to find the best way to co-parent Marliya when they finally split (after reuniting several times previously). Watch this video to find out more about why Mia and Megan have left, and their experiences on the show: