@Neil,

Thanks for your help. I have now updated firmware to 6.10 using the Webupdater. Still no cheese! It still does not show the speed limit. The only thing I am looking for is :
[Only registered and activated users can see links. ] (Image is for information only, its not my Garmin)

What information can I provide to determine whether my map has the speed limit data or not?
My Basemap says F0057-01 5.01 - does this help?

Thanks again.