Nick Yarris, 51, faced the electric chair after being framed in 1982 for the rape and murder of a woman in his native Pennsylvania.
He now plans to marry 23-year-old Lincolnshire barmaid Jessica Stubley.
More top news
The Home Affairs Select Committee has written to Home Secretary Amber Rudd asking her to set up a review
Dave Rayner sustained fatal head injuries after being assaulted in a nightclub in November 1994. Now the Tour is visiting his home town.
Roy Griffiths is due in court as part of an investigation into allegations dating back more than 50 years