Pilley rides Diore Lia in Derby Massive outsider Diore Lia has been declared for the Investec Derby at Epsom on Saturday, with apprentice jockey Paddy Pilley set to ride. Intended jockey Gina Mangan was on Wednesday prohibited from riding in the premier Classic by the British Horseracing Authority but the horse still features amongst 19 declarations. Pilley, a highly-rated 5lb claimer, is now poised to receive the leg-up in the Derby. The BHA said in a statement on Thursday that 7lb claimer Mangan, who has not yet won a race in Britain, could not take part in the Derby under one of its rules which protects "the best interests of the sport". With apprentice jockey Mangan having never ridden at Epsom nor in a big race like the Derby, the BHA said that her participation would pose an increased "risk" to the welfare of jockeys and horses. The BHA had, however, said last Sunday that "there are no restrictions in place" to stop Mangan from riding at Epsom, but that race conditions could be discussed "on an ongoing basis, if appropriate". Diore Lia, a maiden filly who is available at odds of 1,000-1, is trained by Mangan's boss John Jenkins and is owned by Mary Todd. Todd's brother R ichard Aylward bred the horse and has been keen to generate publicity for Great Ormond Street Children's Hospital by running the daughter of Yeats at Epsom. Aylward told Press Association Sport: "She's definitely running and Paddy will be riding her. "Our filly is the people's champion now and I hope everyone gets behind her." The BHA said in a statement that it was "appropriate" to accept Pilley's declaration aboard Diore Lia. Pilley is based with Roger Charlton and has ridden 34 winners.