A London teenager is calling on the government to ban cars in Richmond Park every Sunday.
The 17-year-old wants a car-free day to promote cycle safety, and comes after both Bradley Wiggins and his coach were injured in accidents this week.
Paul Brand went to Richmond Park to see how the idea is going down.
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Delays, diversions and cancellations caused chaos to services on South West Trains which were hit by signal failures in south west London.
During the attack Ione Wells' head was smashed against the pavement, her attacked grabbed at her chest with such force that it tore her bra.
The 17-year-old pushed her to the ground and smashed her head against the pavement, before grabbing at her chest.