Hello Richard,
I am Jaspreet Singh.
Please try accessing the website via another browser and if you can try clearing the cache and cookies on edge browser by clicking on three dots on top right corner then on settings then on privacy search and settings on left hand side.
Under clear browsing data title
Click on choose what to clear.
Tick the option for cache and cookies (please note this will log you out of currently logged in websites but will not delete any stored passwords)
Choose all time from time range option and then click clear now.
Restart your browser.