When Simon's dad takes the four lads to the airport they are seen getting into a silver Mazda 5 medium-sized MPV, we see this car again when Simon's dad is driving, however in the next shot of the car turning right at a junction a silver VW Sharan is used instead.
When Simon is applying Will's suncream at the swimming pool, Will uses his right hand to start applying it before Simon takes over. After Simon has finished applying it and Will goes to start reading his book, his hand still has cream on, but in the next shot it has gone.
In the first scene in Marco's, after Jay says "Feed the pony", Neil lifts his right arm to have a sip of his pint. In the next reverse shot, his right arm has instantly jumped back down to his side where it started.
When the boys arrive at the check-in desk, the lady asks: "Malia flight?". Malia is a small town just outside Heraklion. There is no airport in Malia. All international flights to Crete go to Heraklion airport.
When they boys return from the holiday they are seen at Gatwick Airport arriving from the arrivals hall. The hall shown on the film are the domestic flights, the actual hall is on the floor above which is the main arrivals hall.