The Coal and Other Mines (Horses) Order 1956

9.  Every horse-keeper shall—

(a)ensure that no horse for the time being under his care leaves its stable, for the purpose of work, in an unfit condition, improperly shod or wearing harness otherwise than of a proper fit and in good condition and having a guard for the eyes; and

(b)forthwith after the return to its stable of any horse for the time being under his care, examine that horse and its harness, attend to any injury to that horse, and clean and groom it or cause it to be cleaned and groomed.