Roll Deep will be headlining a secret gig on Thursday to support the Lives not Knives campaign started by Croydon teenager Eliza Rebeiro.

J2K from the Grime music collective, which has launched the careers of Dizzee Rascal and Tinchy Stryder, chose three music acts from Croydon to support him at the gig.

Home-grown groups FMB, Four Star and Raw Savant will perform in front of 250 lucky youths who won tickets to the Roll Deep gig.

Eliza, 17, will also be talking to the crowd about her campaign to stop teenagers carrying knives.

The gig has been organised as part of a Channel 4 project called Battlefront. The teen has been filming her activism since July to get more support for her important campaign to stop teenagers being killed on the streets of London.