I have recently been told that while im driving at night with the lights on and indicating to go left, the left rear indicater and rear light flashes alternatively. I have been told that there is a little electrical box some where in the boot and one of the wires has come loose but i cant seem to find it so im just wondering if it is a loose wire where abouts is this electical box?(if there is one). If its not this what else could it be? please help

I had exactly the same problem last week. You have to remove the rear light(s) (the one thats going wrong) theres just 2 bolts behind the lights, one near the reel for the rear seatbelt, theres just a plastic pop off cover over it, and the other bolt is in the boot, there should be a flap of carpet covering it. There should be a correct sized socket for the bolts and it should be with the jack and that where the spare wheel is, but I didnt have mine.
So, remove the light, undo the connector block and the pins will have a build up of crap on some or even just one. Get something to scrape it off with like a bit of sandpaper or a knife.
Takes 10 mins and should be fine after that!!

Good luck