To help with the congestion and flow of pedestrian traffic, I propose a congestion charge for any tourists out and about at peak time. They can be in Hyde Park in the morning, Buckingham palace is fine, anywhere with big open spaces, they just can't get on the tube or they get an on the spot fine of £3.00 that is shared to the people in the vicinity.
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If anyone else has any great, medium or crap ideas then send them to reuben_leon@hotmail.co.uk and Ill whack them up.