What kind of road bike should i get?

ShutUpLegs

Most 52's will fit you, some small 54's.
Probable suggestions are to buy 2nd hand as £500 will get you something reasonable
If not, some deals on a caad 8, specialized allez, trek etc

essjaydee

Any local bike shops (LBS) near you with a good range of bikes :?:

Go and try some different sizes if you can as this will give you a good idea of what size you need.