It's standard practice for all streaming reality shows, such as Big Brother, Fame Academy, The Salon etc.
The live feed is often delayed by about 10 - 15 minutes, and this allows production team and lawyers to monitor the output, and decide if any of it contravenes ITC guidelines (ie, swearing before the watershed), libel against individuals or companies, and other such things. From watching this afternoon, it might also include music clearance because they dropped the sound from their 'caberet performance' they did to earn wine and chocolate, suggesting that Granada haven't got a blanket agreement with MCPS which Endemol had to get for their shows, meaning that they have to apply for any music used on an individual basis.