The welfare of animals in transport is covered by EU Regulation 1/2005, implemented in England by The Welfare of Animals (Transport) (England) Order 2006 (WATEO 2006) and parallel legislation in Scotland, Wales and Northern Ireland.
Under Articles 4 and 5(1)(a) of WATEO 2006, there is a general duty of care provision protecting animals from being transported in a way which causes or is likely to cause them injury or unnecessary suffering.
EU Regulation 1/2005 and certain provisions of WATEO 2006 relate to the transport of animals in connection with an economic activity. If these provisions apply to you, there may be additional requirements when transporting your dog. Further guidance can be found at GOV.UK Where APHA Inspectors identify transport conditions that are not compliant with Article 4 or Article 5(1)(a) of WATEO 2006 they will take or direct action to be taken.