 He is also doctor for the England Under-21 team and a FA representative on the British Olympic Association Medical Committee.He also lectures on sports injuries.Waller, with the then physio Dave Galley, both famously diagnosed the seriousness with Gérard Houllier's chest pains during the half time interval during the 2001 Liverpool game against Leeds United, which eventually led to an emergency operation on Houllier's heart.