 During the Second World War , Clifton High School was relocated to the property , and in 1941 the U.S. Army Medical Corps established a facility for wounded soldiers , known as the 74th General Hospital , in the estate grounds . The construction of this temporary tented village resulted in the US Army Engineers breaching what was then England 's longest holly hedge . With many tents later replaced by prefabricated buildings and some nissen huts , at one point in the war following D @-@ Day it became the largest US Army hospital in Europe . During the hostilities , management of the estate 's farmland was assumed by the Ministry of Agriculture ( MoA ) , leaving Lady Wraxall only the Home Farm . 
