I remember hearing about "the squirrel woman" years back, woods below the golf course? Never met her but I only became obsessed by the rats after we moved here and conservation of the last reds.
Grey squirrel days (years in truth) are numbered, reading an article in "The Squirrel" magazine today (I can forward it on to you Graham ) about genetic engineering to control them and other invasive species. Phase 1 is completed by Edinburgh university and given cash and a few years it will hopefully be rolled out and see the total end of greys in around 15 years.