By Racinguk.com staff
The five-year-old gelding, owned by John Hales, was one of the Warwickshire handler's most exciting horses after having finished second to Finian's Oscar in the Grade One Mersey Novices' Hurdle at Aintree in the spring.
Skelton told the Daily Mail: "My whole team are devastated to lose Captain Forez.
"At Aintree he showed he had a massive future in front of him and he was only five years old."
Skelton also suffered one of the unluckiest losers of the year at Southwell on Tuesday when Bridget Andrews was unseated from Stick To The Plan after the last flight in the 188Bet Novices' Hurdle.
The 7-4 favourite jumped the last fine but Andrews lost an iron before regaining it.
However, with less than 50 yards to the line, the jockey became unbalanced, lost the iron again and was unseated. The fortunate winner was Nemean Lion (9-1).