Happened to be in Elvetham Heath yesterday (doing some voluntary stuff in the nature reserve in a cunning work scheme to get a day out of the office), and had noticed previously that it was basically missing. (Someone had very helpfully added exactly the road I was looking for however)
So, arriving a little early, I got a few more traces for some of the streets.
Unfortunately I had forgotten to recharge my batteries or to bring a pen, so I could only add a few streets and couldn't note any of the names. Damn! :(
Anyway, at least Elvetham Heath Way now connected between the A323 and A3013.
When I can be bothered, i'll have to head down there again one evening after work and do a bit more.