“When two aircraft are approaching head-on, or approximately so, in the air and there is a danger of collision, each shall alter its course to the right.” (CAA)
When two aeroplanes are flying on crossing tracks the aircraft which flies from right to left has the right of priority.
When two or more aircraft are on final approach the lower aircraft has the right of way unless ATC has already specified a landing order.
Air Navigation order – Schedule 1 Rules of the Air - Section 4 – 10
