http to https white screen of death firefox

Hi,

I am having an issue with my site i that I seem to getting white screens of death when I click on a hyperlinks to my site after I moved to https:

When pressing enter the address bar it seems to work, and the page loads.

I have followed all the advice here
http://designmodo.com/wordpress-https/

updated all internal URLS to be https://

but it still doesn’t seem to work? Is there anything else I can try?

my url https://threenine.co.uk

I have also ensure that all internal links in my site have been updated to https://

I do not have any cache plugins installed.

is there anything else I should edit in .htaccess or wp-config.php ?

EDIT# I have now tried this with all browsers i.e. Chrome, Safari, IE and the same result. Bizaarly, my main browser on my local desktop (chrome) it works!!

However, when trying to access the site from my phone (ios & chrome) it fails!