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Westminster Abbey is a collegiate church governed by the Dean and Chapter of Westminster, as established by Royal charter of Queen Elizabeth I in 1560, which created it as the Collegiate Church of St Peter Westminster and a Royal Peculiar under the personal jurisdiction of the Sovereign. The members of the Chapter are the Dean and four canons residentiary, assisted by the Receiver General and Chapter Clerk. One of the canons is also Rector of St Margaret's Church, Westminster, and often holds also the post of Chaplain to the Speaker of the House of Commons.

Who are the members of the chapter of Westminster?
the Dean and four canons residentiary