Faceless Couple Lurks in London

In what looks like a scene from a horror film, the two sit almost motionless among spectators, their facial features totally obscured by a flesh-coloured membrane.

Close inspection shows that the masks - which appear to be made of a thin rubbery material - have tiny perforations around the eye and nose area so the wearers are able to see and breathe.

With the blankest of blank expressions on their faces, these mysterious figures have been popping up in the most unlikely of places.

The faceless mutants have a penchant for A-list celebrity bashes and have been spotted at Elton John's White tie ball and Harrods summer sale, opened by Sex and the City star Kim Cattrall.

In fact, it looks a lot like a rather more mundane explanation – because the smart money is on it being a 'stealth marketing' effort by Lotus cars.