'Disgust can be so engrossing': fourth plinth artist Heather Phillipson

She once turned a tube platform into a protest against the torture of eggs. Now she is putting a giant dollop of whipped cream in Trafalgar Square. The DJ, poet, musician and artist explains why‘Thank God,” emails the artist Heather Phillipson after our interview, “art is one environment where it’s OK to be a weirdo.” She’s not just talking about the giant swirl of cherry-topped, fly-infested fake whipped cream she’s poised to install on Trafalgar Square