Ron and Harry and that flying car

[pippin_999]

No: HPFGUIDX 187111


Zanooda:
> 2. Some security measures were not there at the beginning of the story (books 1-2), but were added due to certain circumstances (for example, Sirius's escape from Azkaban, LV being at large in HBP etc.).
>

Pippin:
Additional security measures were taken at the beginning of HBP, as Tonks tells Harry. Dumbledore later has to lift some of these charms so he and Harry can fly back to Hogwarts. But there were no charms against entering or leaving by air before. Thus Sirius can escape via Hippogryff, and Harry and his friends can leave via thestral in OOP.

Charming Hogwarts against aerial entry and exit probably interferes with owl post. Maybe that's why they didn't do it until HBP when owls were being checked anyway.

Pippin