Episode One - S1-E1
Visible crew/equipment: The shadow of the camera falls across the table as it moves towards Stacey when she is on the phone to Nessa asking her if she wants an omelette.
Episode One - S1-E1
Revealing mistake: When Gavin and Stacey meet, look at the people all around them in Leicester Square - many of them are stood watching the filming.
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.
Episode Six - S1-E6
Continuity mistake: When Gavin and Stacey have their first dance, look carefully and you can see Nessa sat at a table behind them with other people. Seconds later, the camera moves and focuses on Nessa standing at the bar alone.
Episode Six - S1-E6
Continuity mistake: At the reception, Dawn is talking to Pam and Gwen about the fact that she and Pete's sex-life is dead. Then, Smithy taps on a glass to indicate the speeches beginning, but as the glass is being tapped Smithy is in the shot with his blazer on, talking to Bryn. Then the shot pans over to the other end of the table, and Smithy is suddenly stood up with his blazer off.