Zara Tindall and her husband Mike Tindall enjoyed an adorable family day out together as a group with their children Mia, eight, Lena, three, and and baby son Lucas on Sunday.The Royal brood were all there to support their 41 year old mum and watch her competing in the Houghton Horse Trials in Norfolk. Riding fanatic Zara, who takes after her own mum Princess Anne in her equestrian career, seemed to be having a fantastic time as she doted over her youngest tot on the grounds.