The new McLaren P1 GTR will offer more power, performance, grip and downforce than the standard car. The 3.8-litre twin-turbo V8 has been tuned to deliver 986bhp, it will come with track-focussed slick tyres and the track has been widened.

So far McLaren has only released this sketch, but the P1 GTR is also set to have more aggressive and distinctive styling. It’s also thought that it will have a fixed rear wing, rather than the automatically deploying one on the standard car.

Exact production numbers have yet to be set, but only existing McLaren P1 owners are eligible to buy the GTR version. It’s understood that all 375 of them have been contacted and the ones that have responded positively will put down a deposit.

P1 GTRs will only be built after the P1's production run has finished, which is thought to be by the middle of 2015. Next year will also be the 20th anniversary of the Le Mans-winning F1 GTR.

Buyers of the P1 GTR will become part of the GTR programme. Owners will get consultations with McLaren’s design director Frank Stephenson, chances to be trained by the Formula 1 team’s fitness instructors and access to the F1 driving simulators, plus a minimum of six dedicated track days at F1 circuits around the world.