In the swimming pool scene, we see the female lifeguard swapping places with the male lifeguard on a raised seat by the pool. However, shortly afterward, he tells everyone to leave the pool and is not on the platform.
When Mr. Bean is trying to get out of the car park through the entrance, he uses a wheelie-bin to simulate a car to get the gate to open. After he's out and shifted the bin, he's blocked in by another car. We see a hand take the next ticket (presumably belonging to the driver of the incoming car) but the car pulling up in front of Mr. Bean is so far away from the ticket machine, it's not possible for him to take it and drive into the car park in the short amount of time seen, plus we never see or hear anybody get out of the car to get the ticket.