Bespoke hybrid hypercar shown at Goodwood, with full details still to be confirmed.

UK engineering firm Lanzante has revealed its McLaren P1 GT Longtail at the Goodwood Festival of Speed, complete with a bespoke exterior and interior over the 'standard' version of the British hypercar.

Full details of the special model are still to be confirmed, but we can see that the P1 GT Longtail gets a new aero package and an even larger fixed rear wing – the latter sitting atop a lengthened tail, hence the name.

This version of the P1 was inspired by the 1997 McLaren F1 GT Longtail, which was the road-going homologated version of the F1 GTR race car of the time.

Like the original, the P1 GT Longtail is finished in green, with a green-on-tan interior accented with lashings of carbon-fibre.

Specifications of the powertrain aren't available at this stage, though the P1 GT Longtail will almost certainly use a version of the 3.8-litre twin-turbo V8 mated to an electric motor and battery system seen in the P1 and P1 GTR.

Lanzante's previous creation, the P1 LM,  maintained the 735kW power output of the track-only P1 GTR despite having to retune the uprated  twin-turbo V8 to run on 99-octane fuel, achieved by increasing the turbo boost pressure.

According to overseas reports, the P1 GT Longtail has been commissioned by a cashed-up Middle Eastern client. Further details regarding the P1 GT Longtail will be announced at the Goodwood event, stay tuned for an update.

In the meantime, head to the galleries section for more images, and let us know what you think in the comments!