The pair acted together again in the celebrated 1954 BBC recording of Under Milk Wood by Dylan Thomas, and Ms Christopher had a number of other roles, including work in London's West End.

BBC: Richard Burton's first wife Sybil Christopher dies

Fallon was most impressed by Horatio Nelson after also putting O'Brien's other contenders - Septimus, Dylan Thomas and Mountain - through their paces.

BBC: SPORT | Other Sport... | Horse Racing | Fallon to ride Nelson in Derby