Chance of getting moved to a different cabinet - almost NIl. Two possibilities - pay BT for network rearrangement and that will not be cheap, or if BT has a need to rearrange for their own purposes and that is very, very rare.
Your downstream is well within forecasts however the upstream does look a little low. Which ISP and product are you on? Give your internal wiring a once over to make sure there is nothing casuing a problem. If you think there is a problem, get a copy of DSLStats, then grab a couple of screenshots of the Tones graph - host it somewhere and post a link. It may show a problem.
There is always a chance you may lose a little downstream speed as others are added which may put you into the 40Mbps region
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