8.—(1) A person who causes or permits a vehicle to enter or proceed in a bus lane shall not contravene article 5 if he does so for the sole purpose of enabling a person suffering from any disability or injury (including blindness) which seriously impairs his ability to walk to board or alight from that vehicle and the vehicle–
(a)does not remain at rest for more than 2 minutes, and
(b)in any event, does not remain in the bus lane for longer than necessary for that purpose.
(2) A person who causes or permits a vehicle to enter or proceed in a bus lane shall not contravene article 5 if he does so–
(a)in order to prevent an accident and the vehicle then leaves the bus lane as soon as practicable;
(b)in order to deliver postal packets addressed to premises adjacent to the bus lane; or
(c)in order to collect postal packets from such premises or posting boxes adjacent to the bus lane.
(3) Article 5 of this Order does not apply to anything done–
(a)with the permission or at the direction of a constable in uniform or a traffic warden, or
(b)in accordance with any indication given by a traffic sign which has been placed pursuant to section 66 or 67 of the Road Traffic Regulation Act 1984.