In reply to PaulHermes:
I was looking at cheap road bikes recently and ended buying a Forme Longcliffe 5.0 from Rutland Cycling for £329 (although they've since dropped to £299). The alternative I was considering was Halford/Carrera TDF which was £250.
The Forme is fine as a trashable winter bike, but the MicroShift shifters are grim - honestly, it's like operating a piece of agricultural machinery from the Soviet era. I had a Specialized Allez some time back with Shimano's low-end 2300 - they were silken by comparison!
Looking at the Triban spec on their website, they're describing the white version as using MicroShift, and the red one as Shimano 2300. I would definitely double check in store which you are getting and if it's the latter, try it out first to make sure you're happy with it.