(1) Any vehicle which is owned or hired without a driver by a public authority to undertake carriage by road otherwise than in competition with private transport undertakings.
(2) A vehicle does not fall within the description specified in this paragraph unless the vehicle—
(a) is being used for the provision of ambulance services—
(i) by a relevant NHS body, ...
(ii) in pursuance of arrangements made by or at the request of a relevant NHS body, or made with the Secretary of State or with the Welsh or Scottish Ministers; or
(iii) services for persons who are aged 18 or over and have a disability within the meaning given by section 6 of the Equality Act 2010 (disability).
(b) is being used for the transport of organs, blood, equipment, medical supplies or personnel—
(i) by a relevant NHS body, or
(ii) in pursuance of arrangements of the kind mentioned in paragraph (a)(ii);
(c) is being used by a local authority to provide, in the exercise of social services functions—
(i) services for old persons; or
(ii) services for persons to whom section 29 of the National Assistance Act 1948 (welfare arrangements for physically and mentally handicapped persons) applies;
(d) is being used by Her Majesty's Coastguard, a general lighthouse authority or a local lighthouse authority;
(e) is being used for the purpose of maintaining railways by the British Railways Board, any holder of a network licence (within the meaning of Part 1 of the Railways Act 1993) which is a company wholly owned by the Crown (within the meaning of that Act), Transport for London, any wholly owned subsidiary of Transport for London, a Passenger Transport Executive or a local authority;
(f) is being used by the British Waterways Board or Canal & River Trust for the purpose of maintaining navigable waterways.
(3) In this paragraph—
“ general lighthouse authority ” and “ local lighthouse authority ” have the same meaning as in Part 8 of the Merchant Shipping Act 1995 ;
“ local authority ” means—
in relation to England and Wales, a county or district council, a London borough council or the Common Council of the City of London; and
in relation to Scotland, a regional, islands or district council;
“ relevant NHS body ” means—
in England, NHS England , an integrated care board , a National Health Service Trust, a Special Health Authority, and an NHS foundation trust;
in Wales, a Local Health Board, a National Health Service Trust, and a Special Health Authority; and
in Scotland, a Health Board, a Special Health Board, or the Common Services Agency for the Scottish Health Service;
“social services functions”—
in relation to England and Wales, has the meaning given by section 1A of the Local Authority Social Services Act 1970 ; and
in relation to Scotland, means functions under the enactments referred to in section 5(1B) of the Social Work (Scotland) Act 1968 ;
“ wholly owned subsidiary ” in relation to Transport for London, has the meaning given by section 736(2) of the Companies Act 1985 .