Round two sees the remaining teams with three days to turn £500 into £1,000. As the clock starts, a battle of the lemonade brews - as one team tries to pedal a homemade recipe, while another upsells supermarket pop. Elsewhere, one duo charges £60 a head for a supper club event, another opts for a rowdy bingo night and a rival team attempts to throw a high-end party in an upmarket nightclub. When the clock stops, the teams return to The Vault to see who managed to double their money and kept their place in the competition.