For my first half I'd only ever run 9 miles in training. Things started to hurt a bit about 11 miles in but once I got to 12 I knew I was going to finish. When you're upping the distance the last km or mile always seems hard. If you can do one 10 miler you should find the half fairly easy (as long as you don't go off too fast). From where you are now I'd be more worried about over training than not being prepared. Up your distance gently until the week before the half then enjoy it.
I've now been to several shops and have my certificate. I think I've narrowed it down to a choice between Decathlon's Triban 7 and the Felt F or Z 95. The Triban has a lot of kit for the money but they don't let you ride it outside. I think I'd also have to change the head stem but that doesn't add a great deal of cost. I'll be trying the Felt's out on Saturday.
One other shop owner suggested I spend all my certificate on the Specialized Secteur Sport, the main reason being because it has a carbon rear end. I've checked the specs online and it only mentions a carbon fork. Does anybody have this years Secteur Sport to confirm how much carbon it has? I was tempted at the time but considering it's £200 more than the Felt I'm not sure it's worth it. Any thoughts?
Ribble bikes look great value but I need help with fitting the right bike for me so will have to pass this time. Planet X look like they're out of the cyclesheme price bracket. Cyclesuk don't have any shops near me and they look like they've got their own version of the cycle to work scheme.
I'm not sure about cyclo cross bikes either. The roads I'll be on can be pretty rough but I am thinking about racing on it and I have a mtb for paths, etc.
I will definitely look at the Specialized bikes. Is it just the Allez which is good for the money or are the next ones up (Secteur, Allez Sport) worth the extra?