When Daisy and Onslow arrive at the hotel they park between an Allegro and a Sierra, but when the Major is sat in his Morgan sports car waiting for Hyacinth, Onslow's distinctive Cortina car is nowhere to be seen and the Allegro and Sierra are now parked side by side.
On arrival at the hotel, the car park is dry but when Richard and Hyacinth check-in and viewed from the foyer, it is wet and covered in puddles despite the Major's open topped Morgan sports car parked outside. It is also completely dry again when Daisy and Onslow arrive a little later.