I had mine done a month or two ago by Fleet Autoglass (01525 375050). I was put in touch with them by a guy who is a manager at Pilkington Glass. Lifetime guarantee and deffo use original Pilkingtons and not a far east copy...
They charged me £170 all in and that included the plastic channel that goes around the screen (channel is about £20 ish), but they reused the external trim as mine was good and not that old...
They were really good...
Before that I had it replaced by AutoWindscreens who were worse than bad... Even worse than that...
The last time Autowindscreens changed the screen they didn't fit it properly, but unfortunately by the time I called them they had gone into administration and the company who took them over did so without liability, meaning they didn't honour the warranty...
I had a heat reflective on mine, but I went for the clear mainly because the heat reflective one can cut down mobile phone signal strength, and is only meant to help keep the car cooler... Not something that gets much use in this country :O)