Incase anyone else had the same problem.
My boot key hole didn't work, it just flapped about in the wind and when i remove the boot trim i was met with about 6 peices of metal.
The key unit comes off with 1x 10mm bolt. Undo the bolt and twist the unit, it comes off then remove the cable from it.
I found everything just slips back on over the cylinder and the sping and what looks like a broken dish. Slips back over the end of the cylinder.
This holds it all in place.
Not sure if anyone else has had this problem?