Engine idling

Westminster City Council - Has a the local council decided that National Express idling engine is acceptable? Exceptions The regulations do not apply: --when a vehicle is stationary at traffic lights or in a traffic jam --when a vehicle is broken down and the engine is being run to find a defect --where an engine is needed to keep fresh goods cool or run a compactor on a refuse vehicle --if the council officer decides an idling engine is acceptable for a few minutes such as defrosting a windscreen or cooling down on a hot day