Though Richard Attenborough takes top billing in this drama, I think Bernard Lee actually delivers the more potent performance as the shop steward "Bert". He calls for an unofficial strike of the workers at an engineering plant. Out they go, well most of them do - and it is soon clear to the audience that there is an agitator amongst the workforce intent on using this dispute for a greater purpose. We also encounter a few local hoodlums who have few scruples when it comes to persecuting - violently at times - those few workers who cross their picket line and continue to work. "Curtis"…