Newbie road bike recommendations and numpty questions....
If you still have another bike for pootling on I would be tempted to make this new one a road bike- I had a hybrid for my first year of tri-ing, but it wan't/isn't as fast/light as the road bike I bought to replace it.
£500 will be sufficient to get you a reasonable steed from any of the big manufacturers (Specialized, Giant etc) but you might also want to have a look at some of the left field options (Decathlon, Raleigh). Fit is all important so you need to find either an informed friend who can accompany you or a bike shop who know what is what. Most bikes have 700 wheels, but you can get 650 (the numbers are a measure of the circumference IIRC) on some models which will mean the top tube of the frame is lower.
Madlot wrote (see)
I do finance