The Royal Welsh Showground in Builth Wells, mid Wales, hosts the Welsh Cob Autumn Sale. In front of crowds of up to 3,000, the three-day event sees more than 400 horses go under the hammer. One of the UK's most popular horse breeds, Welsh cobs were once the national workhorses. Now they're in high demand for riding and showing, both in the UK and internationally. Buyers from Japan and Germany are regularly seen at the auction. For seller Marilyn Beach and granddaughter Robin, there's lots at stake. They have four horses to sell, and success will help ensure the future of the family stables that Robin hopes to run one day. Janet Alderton and daughter Jo need new horses for their riding school and know that if they can get what they need, they can change lives.