What could be causing this..

[mrbios]

We run an intranet site which is hosted on umbraco, on this site we have a links drop down all the teachers seem to use where google is the top link. (and apparently explaining to them: Type google.co.uk into the address bar, is far too complicated for them to understand as a temporary workaround ¬_¬)

Lately whenever teachers click the link to google it goes to an SWGfL filtering page, the link is set to Google and i've tried various different variations of it.

I've no idea if it's any use (i'm really not a web coding person) but i've attached an image of the link and properties of the link in question.

Any ideas?