Caring and casual: Prince William and Kate arrive in jeans and slacks for unscheduled stop at town devastated by wild fires

By REBECCA ENGLISH Witnessing the devastation: William and Kate are shown around Slave Lake by a pair of guides after making an unscheduled stop at the town which was devastated by fire Couple visit Slave Lake, where 40 per cent of the town was destroyed by fire in MayDuke and Duchess spend over an hour meeting displaced residents and seeing damageVisit kept under wraps to avoid hampering the