The BT checker now says:
Your cabinet is planned to have WBC FTTC by 31st March 2013. Our test also indicates that your line currently supports a fibre technology with an estimated WBC FTTC Broadband where consumers have received downstream line speed of 68.1Mbps and upstream line speed of 20Mbps.
The local council has the planning application:
There are still no roadworks planned on roadworks.org but I don't think there would be as its a semi private road and there doesn't appear to be any digging on the road.
Now before I get too excited are the above items enough to think that March is a realistic installation date and what has anyone's actual speed been in comparison to the forecasted speeds?