Episode #2.1 - S2-E1
Revealing mistake: When Martin and Katy arrive in Altea, Martin is acting like the suitcases are very heavy. The suitcases don't actually contain anything as you can see the wheels bouncing around on the floor, revealing an extremely light case.
Episode #2.1 - S2-E1
Continuity mistake: As soon as the episode starts we see a passenger jet coming in to land on the runway. In the next shot as it lands, you can see it's a different company's jet.
Episode #2.1 - S2-E1
Continuity mistake: When the Garvey family arrive by the pool, they are being shown around by a hotel worker. Look closely later, and it's a completely different person showing the family around.