Par DURY IAN / THE BLOCKHEADS. Ian Dury was a wordsmith, artist and entertainer who gave the English language two of its most famous phrases drawn from the song titles, Sex and Drugs and Rock and Roll and Reasons to be Cheerful . Now a major British film, starring Andy Serkis as Ian Dury, focuses on his personal relationships during his rise to fame. It is ten years since Ian's last gig at the Lon…