Nicolas,
Thank you for your reply. We removed a number of plugins that were not being used and we appear to be ok. Currently I have no forced SSL in server settings, only SSL at checkout and when I tested it performed ok. The plugin you disabled is still off, that shouldn't be a problem should it?
How do you work with sh404sef? We may use that and I've had issue with it in the past......
As an aside, my company signed up to be an affiliate today, really like your product and do appreciate your support and professionalism. Thank you.
Don