Episode Six - S1-E6
Other mistake: After the wedding when everyone is outside, Smithy says he has forgotten the maps that gave directions to the reception. Bryan says he can use the sat nav in his Picasso and tells everyone to follow him. But he was driven to the church in the Bentley with Stacey, so his car wouldn't have been there.
Other mistake: During the concert, the drummer's hands don't follow the music playing.