Deliberate mistake: In the scene where Peter Andre and his producer watch the footage of the royal family, in the background you can see princess Diana and the queen mother who had both unfortunately passed away before Little Britain was made. They had to use the old footage but it is still a mistake.
Revealing mistake: When the old man has a heart attack at the opera, watch as the paramedic puts the whole box of tic-tacs in his mouth, he obviously doesn't put them in his mouth but down the side of his cheek/face.
Answer: If you keep clicking that card a photo gallery will eventually appear.