MATTHEW HEATH (GBR) AND COOLEY LORD LUX TAKING PART IN THE CROSS COUNTRY PHASE OF THE BRITISH OPEN CHAMPIONSHIPS CIC 3 STAR INCORPORATING ERM AT THE 2017 FESTIVAL OF BRITISH EVENTINGROSS COUNTRY PHASE OF THE BRITISH OPEN CHAMPIONSHIPS CIC 3 STAR INCORPORATING ERM AT THE 2017 FESTIVAL OF BRITISH EVENTING