Hello Nicolas and welcome to the forum. The pilot's wing appears to be a workshop made "1940" issue, made as replacement badges for those pilots arriving in the UK after the fall of France. The 2nd Corps sapper's badge is a copy. The reverse of original badges has much more pronounced die stamp relief.
All thoughts and opinions expressed are those of my own and should not be mistaken for medical and/or legal advice.
"Tomorrow hopes we have learned something from yesterday." - John Wayne