20 metres away from a green cabinet. It appears to be a Virgin Media cab though.
I can only gather that there just isn't enough business for them to be hugely bothered, or they are having issues with planning permission with the cabinet.
if your only 600 meters from the exchange you may not even be connected to a cab and you may be connected straight into the exchange..
if that's the case your waiting for FTTC that may never come.. you may have to wait until BT do some sort of FTTP instead
best bet would be to use the BT wholesale checker and use your address to check not your postcode or number as this will tell you what cab your connected to.