When do I apply to study abroad, just finished AS level?Watch
It's definitely something with considering, you'd get great international experience and with the rising fees and loss of grants in the UK you could be a lot better off looking abroad.
If you're feeling particularly adventurous, I've just finished my year abroad in China and there so many scholarships for international students here, you could easily get all your tuition and loving costs covered by the Chinese government! There are some pretty decent universities too, eg Peking uni in Beijing.
Bear in mind that if you go abroad you'll not be able to get a student loan from the UK government, so you'll have to look into scholarships, private loans, your own savings, etc.