Hello,
A bit more than a month ago, I went to Cambrai for some spotting. The weather was excellent and the wind came from the east. We parked the car near the cafe in the RWY10 approach and had no troubles with the gendarmerie. Here are some examples of what we saw:
The first Djibouti mirage:
And the second one:
The rest can be found on www.sgkoksijde.be