Westminster City Council has made the The City Of Westminster (Restriction Of Engine Idling) (No. 1) Experimental Order 2017 “which will come into force on an experimental basis on 4 February 2017" for a maximum of six months.
“2. The Order will prohibit engine idling by waiting vehicles, with certain exceptions, to facilitate civil enforcement of the contravention (through the issue of penalty charge notices under the provisions of the Traffic Management Act 2004)
3. The Order will apply to any area of carriageway in the City of Westminster designated as a parking place, loading bay, recharging point, taxi rank or terminal point, and to any length of street where waiting is restricted (shown by yellow lines).”