hi dave, i got your message on sunday but wrongly replied on my board instead of yours i think! Doh! The fuse for the washer pump also runs the same circuit as the rear door switch hence why you cant get in the boot, it should be fuse 7 or 8 in the fuse box in the engine bay, its located to the right of the battery in a black housing, the fuse will be a 10 amp, replace it with a 15amp and it should be ok, they blow when you try to use the washers when theyre frozen, if you cant get it sorted just give me a shout and i will pop round and sort it for you.