Mmm. Maybe I'm wrong. I've listened to the below video several times. For the most part, Comrade Bob speaks fairly quickly. However at the end where he utters the fatal words, he slows down and becomes very deliberate. I just wonder if they are going to call an election early, and by keeping up the thought in everyone's mind of May 6th, they will hope to prevent the Conservative campaign machine from being used effectively. After all the Labour party has no money in their coffers for a protracted campaign.
Probably wrong, but worth mulling over.