A landmark judicial review of police practices at last year's Royal Wedding will begin later.
Measures examined will include the use of 'pre-crime' arrests - which were employed before the wedding.
The findings will likely impact future policing at upcoming events such as the Jubilee and Olympics.
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Transport for London expects 34,000 vehicles a month will be liable for the Toxicity Charge on top of the £11.50 Congestion Charge.
Drivers of the most polluting vehicles will pay the new £10 T-Charge, meaning a daily payment of £21.50 to enter central London.
Police are hunting for the owners of this jewellery which they believe is stolen