WB
I went from La Rochelle all the way to San Sebastian a few hundred meters out to sea following the beaches at a few hundred feet with no problems with Danger areas and in ATC communication all the way!
It was CAVOK with clear skies and excellent visibility! Changing to Biarritz I was horrified to hear them giving RVR with unforecast fog something you have to be aware of in that area with the cold Atlantic.
I was then a few hundred feet above solid cloud with San Sebastian still in the clear (just) popping over the fog banks San Sebastian runway appeared in one clear patch over the airport which fogged in 20 minutes later.
Pace