Proud Kate heaps praise on her 'brilliant' brother-in-law for speaking out about his mental health struggles following the death of Diana

Kate, 35, praised her 'brilliant' brother-in-law during a reception for athletes who will be running for Heads Together, the mental health campaign she has spearheaded alongside Harry (inset) and the Duke of Cambridge. The Duchess, dressed down in a striped top from Luisa Spagnoli and trainers, also unveiled the first of 70 Royal Mail post boxes which will be wrapped with Heads Together headbands along the 26.2-mile route. During the reception, Kate chatted to runners training for the Marathon about their reasons for taking part and wished them luck with their final preparations (top and bottom right). The runners also took part in a training session with endurance coach Nick Anderson.