BREAKING: Cameron Rejects Petition Calling For 2nd�Brexit Referendum Signed By four Million People�

PM David Cameron has formally rejected a second Brexit referendum despite an official petition which received more than 4.1 million signatures. 

The petition, which was started by a Brexit supporter William Oliver Healey, urged a re-run in case there was a narrow Remain victory. 

However, the Government rejected the petition claiming it was now time to exit the EU and 'ensure the best possible outcome for the British people'.