Who was John Lennon's best man?

Excerpt from 'The Love You Make. An Insider's Story of The Beatles', by Peter Brown and Steven Gaines. Signet 1984, ISBN 0-451-12797-8
Chapter 8, part 3.

Peter Brown was Executive Director of NEMS Enterprises, the Beatles' management company, and was closely associated with the group, in both business and personal life. He was John Lennon's best man when John married Yoko and still maintains a close personal relationship with the surviving Beatles.
http://www.expectingrain.com/dok/int/theloveyoumake.html


Lennon and Ono. The couple married in Gibraltar in March 20, 1969

John Lennon married Cynthia Powell on August 23, 1962, after finding out she was pregnant. Brian Epstein was the best man at the wedding.

https://www.beatlesbible.com/1962/08/23/john-lennon-marries-cynthia-powell/