A control group of subjects from the treatment waiting list who meet the inclusion criteria will be used. An intra-oral scanner will record the baseline occlusal relationship (T0) and will be repeated after six months (T5). The control group will also have a standard pre-treatment lateral cephalogram taken, as well as conventional and three-dimensional stereophotogrammetry at baseline (T0) and after six months (T5). This will allow changes resulting from growth to be assessed whilst no active orthodontic treatment has taken place.