You can check if your Unipass certificate is working correctly by clicking here.
If you haven't registered for a Unipass certificate you can do so by clicking on the link www.unipass.co.uk.
If you already have a valid Unipass certificate but forgotten to select it, please close down your browser, open again, and try to access the site remembering to select a valid Digital Certificate from the 'Client Authentication' dialog box.