This was the brother-in-law of Sir Peter Batho, 3rd Bt. Note that this article and others online call him "Stefan" though the Peerage works uniformly call him "Stephen".
‘A remarkable man’ - Tributes to former mayor Stefan Oliver
9th July 2020
By Mark Langford
"Tributes have been paid to former mayor of Bury St Edmunds Stefan Oliver, who has died at the age of 80.
"Stefan Oliver was the sixth generation of his family to serve as mayor in Bury St Edmunds....
"He is survived by his wife Anne, their four children and five grandchildren....
"Mr Oliver served as Mayor of St Edmundsbury in 2005-2006, having been elected to St Edmundsbury Borough Council in 2002 and representing Westgate ward for 13 years....
"He was born on Angel Hill in the town to Gabrielle Oliver, a prominent local artist, and Geoffrey Oliver, chairman of Hunter and Oliver wine merchants...
"He worked in farm management for 15 years, during which time he met and married his wife of 55 years,
Anne Batho from Saxmundham.
"They settled in Bury St Edmunds with their young family in the 1970s, where Stefan enjoyed many years as a glass engraver, heraldic illustrator, artist and writer.
"In 1986 he was made a Freeman of the City of London and Worshipful Glaziers Company following his affiliation with the Guild of Glass Engravers."
https://www.eadt.co.uk/news/21400324.a-remarkable-man---tributes-former-mayor-stefan-oliver/