Cars in the street were also engulfed, some with their drivers caught behind the wheel.
Drivers caught speeding entering or leaving the pits will be brought back in for adrive through.
Westminster city council has already introduced £80 fines for drivers caught with idling engines.
Drivers caught using a hand-held mobile phone face a penalty of three license penalty points and a £100 fine.
After that, she said, drivers caught working without the safeguards will be fined $350 and face having their registration suspended.
Last October, police in Islington began handing out on-the-spot fines to drivers caught breaking the 20mph limit.
The fine for drivers caught driving without having proof of insurance with them would be raised from $100 to $150.
Drivers caught not paying the fee would be fined, by post.The benefits of this ambitious scheme cannot disguise the political risks involved.
Tougher fines should be levied at drivers caught using a mobile phone to make a call or send a text, the Government has said.
They needed to bring fresh supplies of ballpoint pens every day to keep up with the workload of drivers caught running the surprise light.
