Medpat, I assume you mean the airman's badge

If so, I can't agree. Firstly the RAF badge is on a rectangular background; secondly on the RAF badge the device (the eagle) is horizontal whereas in the OP's photo the device is more vertical, tending to diagonal top left to bottom right. Thirdly the RAF don't, or didn't, wear slouch hats, and finally
Tonepad has already satisfactorily identified the badge as that of the 20th Indian Infantry Division, shown below.