I know it seems like a con, but I've taken the insurance for both my phones so if anything happens I can get it fixed.
The problem is, everyone is tied into 2 year contracts with the same phone, so if my Galaxy SIII (mrs) or Galaxy Note (mine) should so happen to fall it can get replaced.
And this includes accidental & water damage.
I think the screen is held on with glue and a quick look discovered you may just need to heat & separate the glue. Thus the £5 screen might do.