I've got one from CWC. Not too bad actually. Fits wells and gelcoat finish is smooth. Key differences from a genuine one are: inside is slightly rough finish and in black. It doesn't have the thin guides down the inside on the sides for the infills to slot into. Biggest downside is you'll need to spray it yourself,which if you're paying a pro todo, means it doesn't work out much difference in total cost to buying a genuine one pre-painted. (Genuine fairing prices came down a lot just over a year ago). And because of this, I still have this fibreglass fairing sitting in the loft unused...
More pics and info here:
http://www.beginnerbiker.com/2013/11/fairing-fazer-arrived/Just noticed you're only down the road from me (I'm in Dagenham), if you fancy doing a deal on this fibreglass fairing I've got going spare, let me know. It's a fox eye one mind. Or if you fancy just checking out before buying a box eye one, just let us know.