Cllr Keith Prince AM, Leader of Havering Council, said:
We are deeply saddened to hear of the passing of former Mayor of Havering, Gerry O’Sullivan.
"Gerry dedicated many years to public service, representing the residents of St Andrew’s Ward from 2018 to 2026.
"During his time on the Council, he chaired the Overview and Scrutiny Board before proudly serving as Mayor of Havering in 2024/25.
"Gerry will be remembered for his warmth, kindness and sense of humour, as well as his unwavering commitment to the community he served.
"Our heartfelt condolences go to his wife Sue, daughter Kelly, his wider family, friends and all those who knew him at this very sad time."