The Highway Code advises drivers to give cyclists as much space as they would when overtaking a car, especially when cyclists may be wobbling due to road conditions or other factors.
In the UK, aggressive or unnecessary use of a vehicle horn can be considered harassment, especially when directed at individuals. The Highway Code states that horns should only be used to warn other road users of your presence while moving, not to be used aggressively or in frustration.
Couldn't even stop for two minutes at 11am on Armistice Day.