>> Teresa May pouring cold water on Vote Leave's campaign centerpiece. The UK Prime Minister casting doubts on the effectiveness of a points based immigration system at the G20 summit in China.>> It will be a complex and challenging process leaving European Union.>> May has repeatedly promised to deliver on June's referendum result by steering Britain out of the EU and tightening border controls but she says there's no silver bullet for immigration.
And the points based systems like the one in place in Australia are difficult to manage. Her comments setting up a potential Potential conflict with some of her pro-Brexit ministers.>> And may June the 24th be independence day for Britain.>> Foreign Secretary Boris Johnson put plans for a points based system at the heart of the leave campaign, saying it could bring back democratic control and better meet businesses needs.
>> Good afternoon, thank you very much.>> Reuters' UK Bureau Chief Guy Faulconbridge is in London.>> It's very difficult to see how you can resolve something so fundamental. Of course, Theresa May is on a wide spectrum so she's not only concerned about what her ministers or the Brexiteers think, but she's also concerned about getting access to the single market.
Access to the single market entails some freedom of movement according to the European's full freedom of movement. So Theresa May has gotta balance all of these forces and what she's starting to do is show a little bit, a very small amount of her hand, about her real view about what Brexit may look like.
>> The first glimpse so far on the hardest conundrum thrown up by the referendum. And one likely to stoke fears that a pro remain PM will mean a water down Brexit.