Hi Stan,
Thanks for the suggestion. My hosting provider has assured me that the WP app works fine…
“Well we have many hundreds of WordPress users who do not encounter this issue, therefore it seems the problem is one (or more) of the wordpress plugins you happen to be using, rather than wordpress itself which is causing these issues.”
So like you suggest it is probably one of the plugins. This evening I will try re-installing the WP app from scratch and take it from there – first test the default theme and then installing clean versions of Royal theme and WooCommerce. Will post my feedback here.
Theme versions now included.