 In 1968 , in celebration of its centenary , the Trades Union Congress commissioned British composer Sir Malcolm Arnold to write the Peterloo Overture . Other musical commemorations include " Ned Ludd Part 5 " on electric folk group Steeleye Span 's 2006 album Bloody Men , and Rochdale rock band Tractor 's suite of five songs written and recorded in 1973 , later included on their 1992 release Worst Enemies . 
