Doctor Who Season 9 News: filming in Tenerife, alien revealed?

Filming for series nine is currently taking place in the Teide National Park in Tenerife, home to a volcanic landscape and the third largest volcano in the world. This snap of Freeman with Capaldi and Coleman over there has prompted some to ask what the deal is with the charred-looking red-eyed chap on the left. Is he a new Doctor Who volcano-related alien or just a passer-by in dire need of an exfoliating facial?