Just look around in the phone book. Depends where you are also. If you live in a major city then you can probably get one of those massive fiber optic lines with a good 20m+ down with about a 2-5m up. And at 300 quid a month you should be able to afford one of them with a high bandwidth limit if not a uncapped one.
Who knows. You might just be able to pipe two of them to your place for 300 a month.
But be real now. How would you actually have 300 quid a month to spend on just internet access?
NoPeace - out