Career
He has brought high-profile civil suits in English courts over matters of Anglican faith and practice, including the ordination of women to the priesthood and the legality of the marriage of Charles, Prince of Wales to Camilla, Duchess of Cornwall. Since 1992, he has been priest in charge of Street George"s Church, Hanworth, West London. Williamson is an Anglo-Catholic.
Williamson is a well-known opponent of the ordination of women to the priesthood.
In 1997 he sued the Dean and Chapter of Street Paul"s Cathedral for appointing a woman as a minor canon. On 16 July 1997, he was declared to be a vexatious litigant by justice Christopher Rose at the Royal Courts of Justice.
As a result, he is no longer allowed to bring action within the Courts of England and Wales without permission. In 2005, Williamson protested the legality of the marriage of Charles, Prince of Wales to Camilla, Duchess of Cornwall.
In 2011, with others, Williamson challenged a major grant by the Confraternity of the Blessed Sacrament to the Personal Ordinariate of Our Lady of Walsingham.
The Charity Commission for England and Wales, which described the complainants as "a substantial number", subsequently ruled that the grant had been unlawful. His objection was responded to by John Sentamu, Archbishop of York (who was officiating) and the service continued.