Fiona Spargo-Mabbs gave her son a kiss and a hug, and told him she loved him. Daniel responded by saying "I promise I won't die" before leaving the house and heading to a rave where he collapsed.
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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.