[jayelbe]

Is that really true? Section 51 of the London Hackney Carriage Act 1831 (to which the article refers) doesn't seem to require that; it (among other things) forbids a taxi driver feeding another driver's horses with anything other than corn or hay - but doesn't say anything about requiring them to carry hay for this purpose. There is no other reference to "hay" in the act.

https://www.legislation.gov.uk/ukpga/1831/22/pdfs/ukpga_1831...

[traceroute66]

> Section 51 of the London Hackney Carriage Act 183

I think its one of those cause and effect things.

You have a horse-drawn taxi. You wish to feed your horse at some point during the day.

The law says you can only do so with either (a) your own hay or (b) hay or corn held in your hands.

So the restrictions of the law push you in the obvious direction of keeping a stack of hay on your carriage.

[jjgreen]

I think you're right, the relevant part is actually forbidding feeding your own horse with anything but hand-held hay or corn, implicitly requiring carrying the same, but if you don't have a horse, that's moot ...