Where is a regulation which says you must comply with a circuit procedure OCAS ?
Taken from the Rules of the Air Regulations 2007, schedule 1, section 4, regulation 12:
Flight in the vicinity of an aerodrome
12.—(1) Subject to paragraph (2), a flying machine, glider or airship flying in the vicinity of what the commander of the aircraft knows, or ought reasonably to know, to be an aerodrome shall—
(a)conform to the pattern of traffic formed by other aircraft intending to land at that aerodrome or keep clear of the airspace in which the pattern is formed; and
(b)make all turns to the left unless ground signals otherwise indicate.
(2) Paragraph (1) shall not apply if the air traffic control unit at that aerodrome otherwise authorises.
Also, the
CAA VFR Guide indicates that this is valid particularly for aerodromes outside of controlled airspace:
Flight in the Vicinity of an Aerodrome
The purpose of these paragraphs is to give guidance to pilots and operators at aerodromes located outside Controlled Airspace and is concerned primarily with the application of Rule 12 and Rule 45 of the UK Rules of the Air Regulations.
Based on this, I think you'll find that there are regulations which require you to conform to the circuit. The question is, will you ever be picked up on it? The FI I flew with had never been questioned about his particular join and probably never will be - after all, where there's no prosecutioner, there's no judge and jury - however I can't help but be concerned when I hear people talking about flying against the traffic pattern, even in an empty circuit.
If I may refer to your previous post:
So you are at a deserted airport with no one on the radio other than the FIS guy.
How do you know you are alone in the air? Until such a day arrives when flying WITH two way radio is
mandatory, you will continue to find people flying without a radio. To assume that the air is empty because only you and the FIS are on the radio is really tempting fate.....