fair use policy
Gaming should be no issue, downloading videos and p2p sharing are. If you are interested in gaming watch the difference between 'fast' and 'interleaved'.
With 53db attenuation on a rural exchange there isn't much near term hope here either.
Someone I know has a 58db line and rubbish service from Orange: would LLU help him (TalkTalk is an option) ? Also, do you have to give up your BT line and riska future £140+ reconnection fee ?