Unfortunately your problem is becoming more common. New developments often have their own new cabinet installed. In areas which have already been planned or rolled out with fibre before the cabinet is installed it's a case of 'missing the boat' - Openreach are too busy rolling out new exchanges to come back and fill in gaps in existing exchange coverage. It may be years before this happens.
Alternatively as the cabinet is installed just for the development it may not have sufficient lines in it to merit the investment in a DSLAM. All fibre rollout by Openreach so far is commercially funded and there is no 'social imperative' to serve everyone* unless there is a business case. And that means a large number of lines in the cab. OK your development has 500 properties but do all the lines go through the same cab?
Of course there is the 'double whammy' in Virgin media areas that they very rarely extend their cable network (although they do have a 'cable my street' initiative if you can drum up interest from your neighbours). Problem there is often that the development streets are not adopted for a few years so they can't get permission to dig them up.
Finally have you considered a 4G / WiFi hotspot from EE? If you are in a strong signal area it may give you the speed you are looking for (albeit at a price).
It's a bit ironic that these new developments are often aimed at people on medium to high income who are those most wanting fast broadband connections for work etc. We have a development near me that failed to be ready in time for the fibre rollout earlier this year and it didn't get a DSLAM, despite the houses being packed with tech features and advertised as being CAT-5e flood wired throughout!
* You may be lucky however as London is one of several cities that is receiving government funding to make it 'super connected': http://www.culture.gov.uk/news/news_stories/8931.aspx so despite your doubts Lewisham may be able to get hold of funds to subsidise your cab. You need to start lobbying your councillors to get your area on the list - but it won't happen tomorrow.
Rubbish I live 1 mile away from DERBY in CHESTER GREEN ,
I WANT INFINITY FROM BT
I WOULD SIGN UP TODAY !!! BUT KEEPS CHANGING THE DATE FROM MAR 2012 to JUN 2012
to SEPT 2012 to DEC 2012 to now MAR 2013 WHY
O WHY ?
COME ON BT PLEASE SORT IT OUT !
MY POST CODE IS DE1 3RX
your posts do not go to BT as this is a customer forum.
I have suffered the changes of date just like you and the worst is even if your exchange is upgraded for infinity there is no certainty that your cabinet will be upgraded.
As all work is done at exchange by wholesale and then openreach laying cable and not your ISP BT Retail you just have to sit and wait like the rest of us myself included
I am relly anoyed with bt because i have being looking forward to getting bt infinty installed but everytime i check it gets put back every 3 months and i am not happy my postcode is WF11 8BQ and it is available in other of knottingley west yorkshire please tell me whats going on
Whilst it's not totally clear as the same happened to me, just constant delays. Here are mostly the reasons as to what causes delays http://www.superfast-openreach.co.uk/the-big-build/not-straightforward.aspx
Ive just put a post up about this Crayfishuk. And i am one of those people that was dangled the carrot to stay with BT for another 12 months and was promised Infinity at the end of December... Days after i entered another contract for 12 months BAMB now its March 2013 (And probably longer)
I think this is breach of contract and in some respects BT should be fined.
I know some things can slip, but something begins to stink when it begins to happen weeks, if not days, before the promised day and also happen to every area that was originally presented with that date.....Too much of a coincidence in my opinion....