Volunteers from the Royal National Lifeboat Institution will take to the streets today.
Wearing their yellow jackets and oilskins the volunteers will collect public donations for the charity as part of National Lifeboat Week.
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Tributes have been left in Caledonian Road in Islington where 15-year-old Alan Cartwright died after he was stabbed.
A boy has died after he and his friends were attacked while cycling in north London.
Three police officers have been praised for their actions in helping a four-year-old boy who had become stuck on a roof in Newham.