Hi again
I have solved the issue (and without your help…)
Thankfully I had at some stage last month backed up the entire website, Enfold files included, and FTPing these files back into position has restored the website.
None of your suggestions worked. I will think again before I take action to update Enfold theme in future.

Hi

No good, I am afraid.
I have changed the memory setting as advised:

In wp-sttings.php:
define( ‘WP_MAX_MEMORY_LIMIT’, ‘128M’ );

and renamed the Plugins folder.

For the avoidance of doubt, this has happened while WordPress was performing an update to the Enfold theme, not a plugin.

Best regards