i dont live anywhere near Oxford but i would think it's the same as most places in England, very easy to get green, if you get caught with it by the police,if it's only a small amount at worst you will be given a caution there and then and wont be taken to the police station. my daughter is at southampton university and even though she doesn't smoke she says theres plenty of people who do and they are very open about it as the law is quite relaxed about it.i'm not to sure on street prices as i get from friends who grow but i think the price ranges between £20-£25 an 1/8 or kids deals £10 a gram, i'm sure someone will put me right if i'm wrong. have a great time where ever you go