Don't forget to check the LLU availabilty too. Why? Because even if your cabinet is not enabled, I highly doubt the LLU operators in that exchange will have reduced the number of ports available. The number of (say) Be* or Sky users that have since moved to a FTTC connection will have likely freed up LLU capacity at the exchange.
This should therefore mean that you should be able to get a decent-performing LLU ADSL2+ connection, if such a thing would suit your needs.
I've no direct source for this, I merely infer it from the recent news articles and forum posts showing Be* shedding customers. It's therefore a fairly logical assumption; please of course do research it more first! It might be worth having a look around the area (or use street view if not possible) to find the number of a local takeaway. Pop it into the checkers and see what's said - it should give a good idea of the state of Poplar's LLU.
Was on Xilo C&W LLU on MRCEN, Now Be* on MRARD.