I couldn't find specific guidelines regarding pet travel policy for Arriva Trains. However, I've provided general guidelines followed by most train companies in the UK according to Railway Byelaws and National Rail Enquiries.
UK General Train Pet Policy
- Passengers may take up to two dogs, cats or other small animals (maximum size each animal not exceeding 85cm) on the train without charge.
- Dogs must be kept on a lead at all times unless contained in a basket.
- Dogs without leads, cats, birds and small animals must be carried in an enclosed basket, cage or pet carrier.
- It must be rigid and not open (to prevent escape) and the animal able to stand and lie down in comfort.
- Animals and containers must not occupy seats, otherwise a charge will be made.
- If a fellow passenger objects to the presence of an animal, the owner must move the animal to another part of the train or put it in a container.
Pets Allowed on the Train
- Small dogs
- Cats
- Birds
- Small animals up to 85cm in size
Pets Not Allowed on the Train
- Large dogs (unless on a lead)
- Animals not in cages, baskets, or pet carriers
- Animals that may be a danger to other passengers
Please note this is the general policy and it may differ somewhat for individual UK train companies. You're advised to check with the specific train company ahead of your journey.