There's a DSLAM on Palatine Ave, LA1 4HD. There also looks like a PCP halfway down York Road, and another on the corner with Palatine by the postbox.
Putting that postcode into the Address
checker (not the postcode checker)returns a list of addresses within that postcode, that can be selected to get the speed information.
One entry that can be selected gives:
Address STREET SIDE DSLAM CAB NMBAAW, PALATINE AVE, LANCASTER, LA1 4HD on Exchange LANCASTER is served by Cabinet 11
with a speed estimate of 80/20 (like all the addresses I checked on that postcode)
If that DSLAM is served by cabinet 11, then it presumably is the partner for cab 11!
Looks like 11 to me ... http://goo.gl/maps/AMM0U
As for the distance that 80/20 can go...
I'm on a 400 metre line, and that was easily capable of 80/20 when first installed 18 months ago (nearer 90Mbps). If I re-sync'ed now, the effect of crosstalk would drop my speed to 72Mbps - so 400 metres is a very rough guide to the boundary of an 80/20 speed.