This is copy paste from one web site:
Otto von Smekel and Eva Pokorova of the Delta Research Motor Company tried to create a British "people's car" by obtaining the rights to import Champion cars at Potton Manor, a stately home in rural Bedfordshire. Their first car arrived at Potton Manor in Nov. 1953, but shortly afterwards Champion Cars was declared bankrupt. The Champion designs were then acquired by Maico, who promptly tore up Delta Research's import license. In 1983, following the deaths of Smekel and Pokorova - who had led the lives of recluses since the 1955 collapse of Delta Research, Potton Manor was opened up for the first time in 30 years, and five cars were discovered garaged in the ballroom!