Episode Six - S3-E6
Continuity mistake: When Smithy is driving to Wales for the wedding, the head restraints are missing from the front seat. The next shot is an exterior shot of the car and the head restraints are back in.
Episode One - S2-E1
Continuity mistake: When Gavin and Stacey arrive at Mick and Pam's house in the Saab, the car stays on the drive. A few minutes later, Bryn appears in his Citroen into the same place on the drive and the Saab has moved to the space in front of the house.
Episode Six - S3-E6
Factual error: Dave and Nessa's wedding is meant to be on 13th June and at the end supposedly 6 months later Nessa, Gavin and Stacey are sat on the sea wall in beautiful sunshine in summery clothes when it should be middle of December.
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 Two - S2-E2
Revealing mistake: When Pam opens the door to Gavin Mick Bryn and smithy after smithy went to the driving range you can see 2 Welsh dragons on the mural behind Pam. Even though Pam and Mick's house is filmed in Wales they live in Essex in the show, in England.
Episode Four - S2-E4
Continuity mistake: As Mick pulls into the driveway his Saab reg is P650 OHK. Later in the same episode it's changed to P361 NVM on several occasions. (00:03:00 - 00:09:00)
Episode Six - S3-E6
Continuity mistake: When Gavin and Smithy are side-by-side on the motorway and talking to each other, when we see Gavin's car there is a green and white lorry behind him in Smithy's lane. When we see Smithy's car, there is a silver saloon directly behind him.
