Here’s a full rundown of what to expect in tonight’s episode of Big Brother, which continues on ITV2 and ITVX.CHOO-CHOO: ALL ABOARD THE BIG BROTHER EXPRESSFor this week’s shopping task, Housemates are travelling on board the Big Brother Express. Gathering them in the waiting room, Big Brother explains what lies ahead for the rest of the day. Big Brother: “Housemates, to pass this week’s shopping task, Housemates must travel around the house using the Big Brother Express train and successfully c