Do not break the Law !


PASSPORTS
You should ensure that you keep your pony's passport with you at all times when you are transporting the pony by road. 

(For further information, go to http://www.defra.gov.uk/animalh/tracing/horses/horses_index.htm
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KNIVES
In 99.99% of all cases, it is illegal to have even the smallest knife in a public place, if it has a fixed OR LOCKING blade.  That is so, even if you do not carry the knife on you, but perhaps keep it in a vehicle.  The only knife that you can have in a public place without committing an offence is a folding knife that cannot be locked open, and even then the blade must be no more than 3 inches long.
More details expected soon...