We would hope the housemates had mastered basic addition back in school, but they proved themselves a Vorderman short of the numbers game when it was revealed they'd overspent on the shopping by £147.

Yes. That's a whole £147.

Chris became concerned when he noticed a few key items were missing from the food delivery and took the matter to Big Brother, who broke the news of the overspend. He claimed he'd been doing the maths but that Lydia had rubbed out his calculations.

It's possible things went a bit pear-shaped during the salmon/gammon debate that took place when the shopping list was being compiled. Housemates were divided over whether to order salmon or gammon, with Becky firmly in the gammon camp and Luke gunning for salmon. Lydia and Ashleigh were united in their disdain for the piggy meat.

What the housemates did manage to order were 20 packets of biscuits - something Lydia was particularly proud of. With the announcement of tonight's Biscuit Party she was forced to eat her words. Biscuits are now the one thing that housemates could have done without ordering.