I'm not a lawyer, but I should have thought that the following are relevant:
Re flying near winch cables: Air navigation order; Endangering safety of an aircraft
73. A person shall not recklessly or negligently act in a manner likely to endanger an aircraft, or any person therein.
Otherwise, Rules of the Air:
Rule 17 (5) (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; . . .
Chris N.