The ZRx ones at Cherbourg have been NOTAMmed as no longer effective - refer the websites mentioned above. Cabillaud (= cod!) radar is probably inactive now.
The exclusion zones round the nuclear plants are still in force, and it would be an excellent idea to avoid those.
Endorse the recommendation to visit Jersey or Guernsey - top up with extremely low cost Avgas, pay a low landing fee, and enjoy the island.