After wasting lots of bandwidth on this estimed group I finally decided on a CityNav SD, and just won an ebay bid for an unopened CityNav SD from a private seller with a good ebay history and 100% rating.
Opened it today when it arrived and found an empty SD case inside the appently unopened Garmin cardboard slip case.
Looks as if either Garmin forgot to put one in, or some devious soul in the store removed it and reclosed the slip case before the ebay seller bought it.
Waiting anxiously to hear if he still has the original receipt so that he can approach his original supplier.
Looks like good old paper maps for next week's Dordogne trip
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Bryn