 The castle in which Kelly Ann and Lee find the abandoned baby is  actually a real castle in Mugdock Country Park near Glasgow, where a  large portion of the film was shot. The exterior of the castle is  exactly how it looks in the film, however due to old age, the  interior of the castle was crumbling and deemed unsafe for the crew  to work in. The interior of the castle was a set built inside an  unused factory in Anniesland, Glasgow and most of the set, including  the spiral staircase leading to the castle tower was made of  polystyrene which was then painted by the art department to resemble  real stone.