Hi
The connection message has stopped appearing but the site is really slow to edit. I added some code to the .htaccess file for compression which makes the site itself a bit quicker but not the editor.

Each page takes an age to load.

I have created a temporary user for you to look (see private content)

I also checked out the site on Google Insights and GTmetrix and there appears quite a bit that could be done to speed it up but I don’t understand the theme well enough to edit it unguided.
see
Google Insights:
https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2Fwww.nmsrfr.co.uk%2F&tab=desktop

GTmetrix:
https://gtmetrix.com/reports/www.nmsrfr.co.uk/yeWBmzmc