I am now given to understand that the RHS DOES still have copies - but that one must ask them for it (- it is not available on the RHS website - daft or what?) Yes, David, it would be better for our dosh to go to the authors/printer than some fourth or fifth party - but it's been damned hard to find that route!
I contacted the RHS mail order folk today but they have responded:
Thank you for your email
The book you are enquiring about has now been discontinued and are unable to supply.
I am sorry we were unable to help you in this occasion
Kind regards
Carmen
Mail order department
Maybe I'm being over-analytical, but "unable to supply" is an interesting choice of words rather than stating that they don't hold any copies...
UPDATE: I'm told the last two copies were sold this morning. No, I was not one of the lucky two.