If I might be permitted to disobey the injunction in another thread not to add
to this one - I'll be brief :-) - a large scale map of the frost hollow will
appear in a two-part article (examining whether the frost hollow has weakened)
written for Weather by Jim Galvin. It will appear this spring. Dave and Jack
have the location right - immediately north of the railway embankment.

Julian Mayes
Molesey
Surrey.