A century ago, power on farms was provided by one and a half million heavy horses. Today, heavy horses are almost a thing of the past, except for one place: Sillywrea Farm in Northumberland, where John Dodd's family have lived for more than 150 years. This is the last farm in the country where all the work is done by horses. Together with his son-in-law David Wise and five huge Clydesdales, John runs his farm to the rhythms of the seasons, and although the work is hard, the pace is unhurried as John and David work through the year.