The Egerton-Warburtons were set to celebrate their youngest son Fergus' 16th birthday as their middle son Crawford returned from a gap year in Canada. David made it a coming-of-age tradition to take each of his sons on a "journey of a lifetimequot; to the Kokoda Track when they reach the milestone birthday, having done the same with their other sons, Harrison, 22, and Crawford, 20. At 6am on the