Geoff was an atomic energy scientist and did a lot of work in Dounreay, but he lived for a time in Luxembourg working with, the European Atomic Energy Authority.
He will be talking about his life as an atomic scientist.
He was also a fanatical yachtsman and he and his wife, Joan, (the current President of Dorchester Poundbury) used to spend their holidays sailing around Europe - Baltic etc.
He has also taken part in a trans-Atlantic race.