The Guardian's Three Little Pigs ad: behind the scenes - in pictures

Extras playing riot police line up outside the Royal Naval College in Greenwich, in anticipation of the protest scenes Photograph: BBH/The Guardian

In the thick of the action during the demonstration Photograph: BBH/The Guardian

Tributes to the big bad wolf left at the graffiti mural Photograph: BBH/The Guardian

The swat team prepare to enter 1 Tuffet Way and arrest the third little pig Photograph: BBH/The Guardian

Protesters in pig masks receive direction ahead of filming Photograph: BBH/The Guardian

A forensic investigator photographs evidence in the third little pig’s brick house Photograph: BBH/The Guardian

Outside 1 Tuffet Way, where the third little pig was arrested Photograph: BBH/The Guardian

Filming the police chief, as he explains the guilty verdict Photograph: BBH/The Guardian

The three little pigs are escorted into court Photograph: BBH/The Guardian

The first little pig is brought into the court room Photograph: BBH/The Guardian

A pause in filming sees the masks come off Photograph: BBH/The Guardian

Photographers line up outside the court as the little pigs are taken inside Photograph: BBH/The Guardian

The three little pigs in the dock, awaiting their fate Photograph: BBH/The Guardian

A court room artist makes a sketch, as the three little pigs stand trial for murdering the wolf Photograph: BBH/The Guardian

Our three little pigs reveal their true identities as they take a break from filming Photograph: BBH/The Guardian

One of the bespoke pig masks created for the Guardian advert Photograph: BBH/The Guardian