The age groupings are continually reviewed with a view towards aligning them with the rest of the performance structure and current European classifications: in 2004-05 the transition was made in the girls programme to change from U15/U17 to U14/U16, leading into the Junior National Squads at U18 with the under 14s playing the 4 v 4 format in line with the Technical Model for players of that age. The boys remain U15/U17 and lead into the Junior National Squad at U19, therefore a boy could enter the programme aged 14 and spend four years training monthly with their regional squad before graduating into the Junior National Squad.