Can Labour really tame the unions?

Less than 48 hours after Transport Secretary Louise Haigh hailed a new deal with train drivers... the rail union Aslef announced further strike action. So what happened to Labour's 'relationship reset' with the unions? And with recent pay deals, what incentive is there for workers to compromise with the government? Fraser Nelson and Isabel Hardman join James Heale to discuss. Produced by Patrick Gibbons.