The parents of the murdered teenager Jimmy Mizen are to receive an MBE for their work with young people at Buckingham Palace later.
Margaret and Barry Mizen worked tirelessly to raise young people's awareness of the consequences of violent crime, following the death of their son in 2008.
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Surrey Police are appealing for witnesses after the driver was seriously injured in the crash in the early hours of Saturday.
The Duchess of Cambridge has been driven to St Mary's Hospital in London in the "early stages of labour", Kensington Palace has said.
The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.