Today's GB - Kempton Park Horse Racing Picks

Trifecta

A wager picking the first, second and third horses in the exact order. A trifecta box means paying more to ensure the horses can finish in any order in the top three spots.

Stewards

The officials watching every race at a meet to enforce the rules.

Bleeder

A horse that bleeds due to a ruptured blood vessel during a race or workout. The medication Lasix can fix this problem.