JBRumours are circling that Jenson Button is considering a switch to the world endurance championship should he fail to land a competitive Formula 1 seat for next season.

Sources say the McLaren driver has had talks with Porsche, for whom former F1 racer Mark Webber drives. With McLaren waiting for an answer from their main target, Fernando Alonso before finalising their driver line-up, this may have substance.

Button is only interested in remaining in F1 if he can secure a competitive car, his manager Richard Goddard said. McLaren are the only big team still to finalise their line-up and have yet to decide whether to retain Button or his team-mate Kevin Magnussen, alongside Alonso if the Spaniard decides to join rather than take a year out of F1 in the hope of securing a Mercedes drive in 2016.

Goddard said: “McLaren aren’t sure what they’re doing and what their line-up will be. That’s pretty obvious. “Anyone who has a race seat available would like to have Jenson in it.”

“Jenson is still focused on F1 but would only want to be in one of the top teams. So we’re always open to talking to anyone. The world endurance championship is a formidable series that is gaining strength and Mark going there has added a lot to it.”

“It is a very credible race series to compete in. Jenson is an incredibly competitive racing driver who wants to race. He’s too good to sit at the back of the F1 grid. So he either gets a competitive car in F1 or he goes to get one elsewhere.”