Radar at Bovingdon? Splendid idea.
Most of stack traffic will be in the 'overhead'.
Why not replace the one at EGLL? People are used to seeing radars at airports FFS. They're one of the things you've got to have. PAX derive comfort from seeing a radar head rotating, unlike the residents of leafy Bovingdon, who obviously do not.
So much for NATS 'Vision 2011 Acting Responsibly' initiative.
Aw, sh1t, sorry, it's 2012.