Jaguar is considering offering track-focused accessory upgrades for its flagship 542bhp Jaguar XKR-S.

This test mule has been snapped lapping the Nürburgring while equipped with an elegant race-look rear wing and a set of four aero ‘whiskers’ fitted in pairs to each corner of the front valence.

According to a Jaguar source the parts are non-production, but are being assessed by engineers.

"This does not signal intent for them to appear on a production car," confirmed the insider.