May need a little help on this one...I tried replacing a light bulb on the tail of my G-reg Fiorino just to realise that it's actually the fuse tripping.So at the moment i neither have a left tail light nor number plate lit.Has anybody had that before ie most likely causes or do i go for a fullscale investigation and trace cables? Any help would be much appreciated

Are the grounds all right..?

yes the grounds (earth?) are alright and i think i may have found the fault last night after tracing the wiring...i had some welding done on the l/h door sill and believe the welder may have baked a tiny part of the wiring loom. I have to have a closer look later and report back. Thanks for the interest