Peter Townsend

1914-1995. War veteran, divorced. Princess Margaret and he wanted to marry in 1955, but - after pressure from the Church, part of the media, politics and the Royal family - Margaret decided against it.

Margaret and Peter Townsend

Sources:

http://news.bbc.co.uk/onthisday/hi/dates/stories/october/31/newsid_3202000/3202307.stm

http://www.nytimes.com/1995/06/21/obituaries/peter-townsend-dies-at-80-princess-margaret-s-love.html

Video on Townsend