I used to look on rightmove for building plots...basically, there were none.
Now, NN1 + 40 miles: 440 listings.
There seems no consistency in the pricing neither.
This sller has a novel plan for selling though....keep putting the price up:
http://www.rightmove.co.uk/property-for-sale/property-32330145.html
"16/01/2015
Price changed: from '£450,000' to '£475,000'
23/09/2014
Price changed: from '£400,000' to '£450,000'
16/09/2014
Initial entry found."
Still with inflation running at 0.5% that's a bargain.