The Air Navigation Order 1989

Power to prohibit or restrict flying

74.—(1) (a) Where the Secretary of State deems it necessary in the public interest to restrict or prohibit flying by reason of:

(i) the intended gathering or movement of a large number of persons;

(ii) the intended holding of an aircraft race or contest or of an exhibition of flying; or

(iii) national defence or any other reason affecting the public interest;

the Secretary of State may make regulations prohibiting, restricting or imposing conditions oh flight:

(aa) by any aircraft, whether or not registered in the United Kingdom, in any airspace over the United Kingdom or in the neighbourhood of an offshore installation; and

(bb) by aircraft registered in the United Kingdom, in any other airspace, being airspace in respect of which Her Majesty’s Government in the United Kingdom has in pursuance of international arrangements undertaken to provide navigation services for aircraft.

(b) Regulations made under this article may apply either generally or in relation to any class of aircraft.

(2) If the commander of an aircraft becomes aware that the aircraft is flying in contravention of any regulations which have been made for any of the reasons referred to in paragraph (1)(a)(iii) of this article he shall, unless otherwise instructed pursuant to paragraph (3) of this article, cause the aircraft to leave the area to which the regulations relate by flying to the least possible extent over such area and the aircraft shall not begin to descend while over such an area.

(3) The commander of an aircraft flying either within an area for which regulations have been made for any of the reasons referred to in paragraph (1)(a)(iii) of this article or within airspace notified as a Danger Area shall forthwith comply with instructions given by radio or by one of the prescribed visual signals by the appropriate air traffic control unit or by, or on behalf of, the person responsible for safety within the relevant airspace.