They are running the same versions of PHP & MySql as us. The duplicator plug-in was suggested to me but that failed too. Exporting the content worked to an extent. Unfortunately the product portfolio failed to transfer, as this was part of the Theme. I will follow up with the theme builders to see if I can export the portfolio content separately but there doesn’t seem to be one.
I feel a little better about only having to re-build one page rather than the entire site.
Thank you for your suggestions.