The Ribble bikes are excellent.
Ribble themselves are in my experience not.
Personally I'd never buy anything more complex than socks from Ribble..... but to be fair others have had better experiences.
I'd also have a look at the entry level bikes from Planet X - they're also excellent bikes.
£520 at the moment - most basic build - Sora. I would change the wheels - Aksiums would make it £574. Change the tyres to Lithions and you've still got change from £600. The downsides - it's not the lightest of bikes, or the most responsive, and the mudguard clearance is minimal - you can't really fit bigger than 23mm tyres, and the guards will still clog up with mud pretty quickly. The frame could do with upgrading to allow more clearance.
If you're a heavy lad or have unusually powerful legs I'd avoid. I borrowed one off a guy in another department for a morning last year to see what In thought before I bought, and laying down the power the frame visibly.flexed in the BB/downturn/seat stay area. It could simply be an unwanted function of the large frame size, but something to consider.
Thanks Vickster - i'm roughly 6'2...that Giant looks a cracking deal, but prob not gonna buy for a couple of months.
Main reason I was interested in the Ribble was beacause a) it looks awesome b) it has mudguards c) I want a road bike d) It was cheap and e) I heard it was popular (not always a sign that it's brilliant, but still...)