I dont know if this is too late now, knowing Alevel results were out last month. Either way, inshaAllah if you are keen on medicine only, then there are two possibilities.
1. If you already got your 'A' grades, then UCAS application is open now for 2010 entry and you can try re-applying inshallah this month. Enhance your personal statement with work experience, and get your favourite tutor to write you a good reference. InshaAllah dont give up, and in the mean time you can work and gain plenty experience.
2. But if you did not meet the entry requirements, don't worry yet because you can try three other options:
A) You can apply for biomedical sciences or biological sciences degree through clearing now to any university, and then re-apply for medicine after you complete that degree (which is 3 years). So practically, you apply for medicine as a graduate after COMPLETING the biomed degree and getting a minimum degree class of 2.1. Most medical schools accept this. Which is actually not as bad as it sounds because you get immense laboratory experience which will help you alot at medical school. It also makes you stand out when you are applying for your F1 (junior doc) trainning post after completing medicine.
B) You can apply for biomedical science at Newcastle university. If you do well in your first year i.e. get a first class, you can transfer to medicine at the same uni. So here you dont need to finish the biomed degree, you just have to do the first year. http://www.ncl.ac.uk/biomed/undergrad/Transfer%20to%20Medicine%20and%20Dentistry.htm
This link shows you the transfer from biomed to medicine.
C) You can apply for a 1 year Access to medicine course at certain colleges, and after you get good marks you can re-apply to medicine. Disadvantage is not all uni's accept this, but some like UEA and KingsCollege accept this.
If there's anymore i can help with you can pm me inshalah.
All the best.