If you have a car, I would suggest bringing it down. Get it MOTd just before you leave, let the tax lapse after you get here (declare it SORN at your parents address) and then come down via the chunnel and France.
Petrol is around 50p per litre and most other car bits etc. are cheaper. It is a 10 min drive into Jerez (similar from Kidlington to Oxford, by the way) and 30 min plus to the beach - you will be the most popular guy on the course (your mates will pay your petrol!).