Wasps Academy winger Christian Wade
It was only the second time England had beaten the Boks in sevens on South African soil in what was a hyper-competitive plate competition.
England had to bounce back from their cup loss against winners New Zealand to beat Australia 24-5 in the plate semi final.
The last time an England side had beaten a South Africa side on their home patch was in 2003, but with Christian Wade (London Wasps), Worcester's Jake Abbott, Ben Gollings (Gold Coast) and Isoa Damudamu (British Army) in inspired form Ben Ryan's side ground out an impressive win, the biggest defeat Paul Treu's side had faced in 80 matches.
England add 12 points to their World Series tally which puts them in third place behind Fiji and New Zealand respectively after reaching the Dubai cup semi final earlier this month.
Jake Abbott (Worcester Warriors), Kevin Barrett (capt, Saracens), Chris Brightwell (Birmingham & Solihull), Dan Caprice (Blackheath RFC), Chris Cracknell (Unattached), Isoa Damudamu (British Army), Ben Gollings (Gold Coast, Australia), Dan Norton (Bristol Rugby), James Rodwell (Moseley RFC), Nick Royle (Fylde RFC), Matt Turner (Bristol Rugby), Christian Wade (London Wasps).
England Sevens Emirates Airline South Africa Sevens results:
December 11, England 42-0 Tunisia
December 11, England 17-7 Argentina
December 11, Scotland 19-29 England
December 12, cup quarter final England 19-22 New Zealand
December 12, plate semi final England 24-5 Australia
December 12, plate final England 21-7 South Africa
England beat South Africa 21-7 to win the plate at the Emirates Airline South Africa Sevens.