In 1953, Briggs married the author and publisher Isabel Colegate, and they had two sons and a daughter.[2]
A company director in the oil business,[3] in 1961 Briggs bought and began to restore Midford Castle, a Strawberry Hill Gothiccountry house near Bath. He went on to serve for twenty years as Chairman of the Bath Preservation Trust.[2]
Briggs owned Midford Castle for more than 45 years, making repairs, treating a former chapel as a picturesque ruin in the grounds, buying back land and buildings which had previously been sold off, and thus bringing the size of the surrounding parkland and woodland up to 59 acres. The property was advertised for sale in 2007.[4]
In 1984, Briggs’s daughter Emily Susanna married Jonathan G. Ashley.[5]
^"BRIGGS, Michael Fenwick" in The Directory of Directors: A List of the Directors of the Principal Public and Private Companies in the United Kingdom (1997), p. 85