Women’s loos: a place of camaraderie, retreat and even high drama? Samantha Jagger has been documenting what happens in the ladies for 10 years. She's captured candid moments between friends and strangers and her photographs, mostly taken in pubs and clubs in Manchester and Leeds, are about to be exhibited in a show called Loosen Up. Katie Sherdley, Catriona Innes and Cath Lloyd talk to Tina Daheley about being children of a parent who's transitioned.