The first day of strike action has begun with large parts of the country's railways, as well as London's underground lines, shut down. But where workers are trying to put pressure on the government and Network Rail over higher pay, it seems like the Labour party is in more trouble. Disagreement over the party's position on strike action (after all, it was set up to represent the unions in parliament) are playing out publicly, even on the front bench. Katy Balls talks to James Forsyth and Isabel Hardman.
Produced by Cindy Yu.