Thanks for all your replies people. I finally got a new screen for my phone. I did try to separate the LCD, touch screen and frame but was a bit heavy handed and not only broke the touch screen but also the frame. I do however think it would be possible but would advise anybody attempting this to be very gentle and take your time.
I much easier method is to replace the touchscreen, frame and LCD in one. I got mine from spemall and I am very happy with the result. I cannot be sure this is a genuine screen but I certainly cannot tell as it looks and works flawlessly and I have been using it for s couple of weeks now. Poastage wasn't the quickest, I think it was over a week before I received a tracking number but once I received that it was with me in a few days.