My De Fossards from England

My Grandmother, Aileen Mary Seabrooke, married a man with the surname De Fossard. They had one son, as far as I know, named Nicholas G H De Fossard who was born around London in 1930. He had a wife by the name of Rachel and they had two children, George and Jessica.

Nicholas lived in England but also had a home in Normandy.

This is all I know. If anyone can fill in some blanks I would love to hear from you!