The competition scenes were filmed in the Courtyard Theatre in Stratford-upon-Avon, the same theatre where David Tennant played his famous Hamlet (2009).
Jessica Hynes, who plays Angel Matthews, appeared in three Doctor Who episodes where David Tennant played the Doctor.
The Coventry Blue Coat Choir, which play St.Cuthbert's in the film, spent time standing in a swimming pool in order to hone their breathing techniques prior to singing.
Joanna Page, who plays Mrs. Peterson, was Queen Elizabeth in the 50th Anniversary special of Doctor Who: The Day of the Doctor opposite David Tennant.
During the raft scene, David Tennant actually threw himself around a little bit. Unfortunately, he timed one of his jumps a little wrong, and he ended up in the river. Marc Wootton reacted quickly by telling the director not to panic, and actually helped David out of the river.