Thanks for the reply Billy, i picked my lower bumper up on monday afternoon and was going to be patient and wait until the weekend but it got the better of me, so i took it on in my lunch break tuesday!!
Your spot on, there are two screws in the rear arches and then i had three larger ones on the underside of the bumper and then two small ones a bit further back (further under the car)
I didnt bother taking the top half off though, i just popped one side of the bumper off and slowly worked my across (taking number plate off when i got to the middle) Like you said i used a flat screw driver VERY CAREFULLY against the top half to slide out, its sounds like a pain in the ass but once you get the jist of it your away.
This is where looking back it may have been a better idea to take the top bit off!! However i managed to get a mate to hold one side whilst i popped in the left side, and a couple of clips back, then i did the same other side so it was supported. I thought it was easy at this stage, how wrong i was!! This was the point i struggled a bit, once both sides were aligned with wheel arches i was ready to take on the rear, all corners were in fine as i could use the upper part to gain some leverage, however in the middle of the rear its really weak and from where the crash bar is it was near impossible to stop the lower bumper popping out of the top half! At this point it was time for a cuppa and a fag!! After staring at it rubbing my head i decided i need some ones help! They held the top half still for me using the number plate recess and i managed to pop them in! Once i popped the number plate on it sunk a bit further and aligned perfectly!
Needless to say i was rather happy with the end result! Looks so much better than stock with the textured bumper.
Advise for anyone if you are just taking off the lower bumper id advise having someone to help as it can be a bit tricky at some points, in hindsight i would prob take off the full bumper if i ever did it again.
Took me hour and half but the boss was out so happy days!!