The stained glass windows featured in The Trinity, the scenes where Gabriela sings Amazing Grace, were designed by William Morris.
The Red Cross worn by the lead character Gabriela belonged to the Director Deborah Hadfield.
The bible given as a gift to Rob by Gabriela is also used in an earlier scene, it is the family bible of the director Deborah Hadfield.
Pete Conway who plays Reverend William Sharp is famous as the Father of the singer Robbie Williams.
The Lady Bower reservoir seen in the opening shot was also used as a location for the Mission Impossilbe - Rogue Nation. The sink hole was filmed and then special effects were added so it looks like Tom Cruise dives in to it.