Manny Pacquiao and Amir Khan came across each other again in a tumbledown corner of south-east London and began informal, man-to-man discussions about an alternative superbout in case Floyd Mayweather fails to call either of them for his next megafight.

Khan and Pacquiao are friends and sparring partners and they met up at the century-old Fitzroy Lodge Boxing Club in Lambeth.

The visit of ring royalty to this dusty but hallowed corner of boxing came at the end of Pacquiao’s visit to London which included Thursday night’s dinner with boxing fan Prince Harry at Buckingham Palace.

Khan prefaced the reunion by visiting Wembley stadium, which has been mooted as a venue if he ever agrees to a welterweight battle of Britian with Kell Brook. For Khan to fight Pacquiao, Mayweather would have to pass on the two leading contenders to face him in Las Vegas on May 2.

Khan is aware that Mayweather versus Pacquiao is the $300 million spectacular which most of the world wants to see and Pacqiauo said: “I think now Floyd and me is going to happen. It looks like it.”

Even so, the PacMan is putting Plan B in place with Khan.

The Filipino’s advisor Michael Koncz said: “Just in case Floyd doesn’t come through we regard Amir as the best alternative. Manny would be happy to do it at Wembley.”

Khan added: “Abu Dhabi is also very much in the running.”