Whilst trying to work out for myself where the apostrophe in "Mechanics Yard" should be placed (see Pedestrian Heart Update below, and yes, you're right, I have way too much time on my hands) I came across Durham County Council's GIS mapping service.
Although we are now part of a Unitary Authority, the County still hold important archives, including historic maps. If like me you love local history, simply click on the "launch GIS now" icon and then click on the "search" key (top right hand corner of the page). Under 'keyword' enter your postcode. This takes you to a map of your immediate area in 2001. You can then follow the development of your locality through maps in the twentieth and nineteenth centuries. Personally, I found that altering the scale from 2500 to 3500 gave greater clarity. It's a cracking service and well worth a try.
(By the way - it would appear that it is in fact Mechanic's Yard - sorry Mike!)