Escape from the Dark

Escape from the Dark American title The Littlest Horse Thieves is a 1976 British family drama film produced by Walt Disney Productions, directed by Charles Jarrott and starring Alastair Sim in his final film role, Peter Barkworth and Maurice Colbourne.

Set in 1909, a coal mine in Yorkshire, England has used ponies to haul coal for many years. When they are to be replaced by machinery that will speed up production and increase profits, three children Dave Andrew Harrison, Tommy Benjie Bolgar and Alice Chloe Franks learn the ponies are to be slaughtered so they team up in a scheme to steal the horses and give them their freedom.The film was released on VHS as Escape from the Dark UK and The Littlest Horse Thieves US by Walt Disney Home Video in the 1980s. ........

Source: Wikipedia