HC Deb 31 May 1927 vol 207 c226W
Colonel DAY

asked the Secretary for Mines in what mines, and to what extent, mechanical haulage has been substituted for pit ponies for the 12 months ended to the last convenient date?

Colonel LANE FOX

Precise information is not readily available, but about 4,000 fewer horses were employed in 1926 than in 1925. In part, no doubt, these horses were displaced by mechanical forms of haulage.