Yes the link works, Jack - and I'm sure from what the locals have said
that Valley Road is right. My estimate of Hawke's location is about
400 metres East of yours, closer to the junction of Valley Road and
The Drive (National Grid ref: TQ 05370 95300, elevation 177 feet
amsl). Streetmap link for the junction is http://tinyurl.com/5pa49 .
The nearby A404 is about 50 feet up the valley side at its junction
with Valley Road.

The extract from Lamb's book suggests that the blocking railway
embankment (and a road or foot bridge under) is 300 yards to the SSW
of the road junction I mentioned. The route to the railway embankment
would be South along The Drive then SW along Winchfield Way. As to
Hawke's exact location, I'd guess he was on Valley Road, about 100
yards West of the road junction I mentioned.

Can any "locals" or National Weather Historians confirm that Jack
and I have it right and hopefully be even more exact?

--
Dave
I can't confirm that to be the exact location but the drop from the A404 to
that point is very steep.

Alan