Mike Brown of England poses for a portrait following a press conference at Del Bono Park Hotel on June 8, 2017 in San Juan, San Juan.

Jonny Wilkinson laughs with Mike Brown of England during an England training session at Pennyhill Park on February 22, 2017 in Bagshot, England.

Mike Brown of England reacts after scoring their third try during the 2015 Rugby World Cup Pool A match between England and Fiji at Twickenham Stadium on September 18, 2015 in London, United Kingdom.

Mike Brown of England touches down for the first try during the Old Mutual Wealth Series match between England and Samoa at Twickenham Stadium on November 25, 2017 in London, England.

Tim Visser of Harlequins is congratulated by Mike Brown after scoring the winning try during the Aviva Premiership match between Harlequins and Saracens at Twickenham Stoop on December 3, 2017 in London, England.

George Ford, Owen Farrell, Ben Youngs and Mike Brown of England complete a passing drill during a recovery session at the Hilton Vilamoura on November 2, 2017 in Vilamoura, Portugal.

Lachie Turner of Exeter Chiefs dives over for a try under pressure from Mike Brown and Nick Evans of Harlequins during the Aviva Premiership match between Harlequins and Exeter Chiefs at Twickenham Stoop on April 14, 2017 in London,...More

Mike Brown of Harlequins celebrates scoring a try with team mate Tim Visser during the Aviva Premiership match between Harlequins and Newcastle Falcons at Twickenham Stoop on March 25, 2017 in London, England.

Mike Brown of England (R) and Ali Price of Scotland battle to catch the ball during the RBS Six Nations match between England and Scotland at Twickenham Stadium on March 11, 2017 in London, England.