If a fuse keeps blowing there is some short of low resistance circuit beyond it, probably a short circuit. According to my Haynes manual, F8 in the under-bonnet fuse box powers the reversing lights. F3 is the interior light, but that is a main fuse so it should be okay. The radio comes from F26 on the passenger fuse box and central locking via F28, also in the passenger fuse box. F3 also supplies these fuses but as it also supplies all ignition circuits it must be okay.