Monsters of the road: what should the UK do about SUVs?

They have higher emissions, hog roadspace and are more dangerous for other road users. Yet SUVs are selling better than ever. As calls for curbs increase, some people are taking matters into their own hands

It's midnight on the edge of Clapham Common in early September. The streets are eerily quiet as a shadowy figure in black shirt, shorts and baseball cap emerges from the common. He is wearing a red face mask, his features, except for some blond locks, hidden from view.

A university-educated professional, Will", as I'll call him, is making one of his monthly late night rounds of various well-heeled London neighbourhoods. He is looking for cars, specifically big, high-end sports utility vehicles (SUVs) - not to steal or vandalise but to bring down in the world just a little.