Hi Simon,
Thanks for taking the time for the Dropbox and sorry I am unable to PM you direct with my thanks. I have downloaded the data but it is not straight forward as I think the card system has a slightly different operating system.
However, not beaten yet, so rather than possibly corrupt the 2015 card I have copied the complete card and its operating files into a clean folder on the PC and then updated the maps for GB and Ireland to the clean copy from your data.
Not sure this has worked yet as I need to get a larger card in the morning as my 2015 card is only 8 gb but the new file needs 8.5 gb so I suspect I have duplicated something but I will get a bigger card and then copy it all onto that and see how I get on.If successful then I can update the remainder of the data using the same principle
Thanks again.