I'd have a look at the ribble winter bikes or a second hand Adax bike.
If you're not sure what you want, I'd have thought a cheaper second hand frame/bike with mudgaurd eyelets and space for 28mm tyres would be the best place to start.
A second hand audux bike is definitely the sensible option, I'm not going to be looking to buy anything for a couple of months at least so i'll keep my eyes on eBay and the classified here to see what's around!
I'd have a look at the ribble winter bikes or a second hand Adax bike.
If you're not sure what you want, I'd have thought a cheaper second hand frame/bike with mudgaurd eyelets and space for 28mm tyres would be the best place to start.