Flying in France (interpretation)

Hi everyone,
I’m a tad confused by the French Geoportail map message about flying in a Red zone!! I would normally avoid a red zone like the plague but I was intrigued by the explanation for this particular area.

It says “except…” and I’m wondering if I’m allowed to fly there in the open category?

I have a mini 4 pro and the relevant insurance and flyer ID from the EU LBA but with a police station less than 1/2 km away I didn’t want to take any chances :wink:

Many thanks for your advice.

Barry