Robbie finds out that Declan is including Katie in the festival meeting, and hatches a plan to ensure she cannot attend. He's probably planning on boring her to the point of blackout. Dan worries he has gone too far to impress Chas after agreeing to take part in the fancy-dress fun run (he's going as a Smurf...), while David makes sure everyone knows Ali made a mistake. I.e. that he didn't impregnate Rachel.