Suddenly my Safari Google searches find French sites!

I am in the UK and I have had to stop using Safari, which is set to use Google for searches, because when I do a search from the integrated URL/search box it finds French sites. It is just as though I had loaded http://www.google.fr. It finds vendors in France and favours French sites generally. Previously it found UK vendors and sites. If I change the search engine in Safari to Yahoo then Yahoo finds US sites. The only way I can do searches as before is to load http://www.google.co.uk, which is a lot less convenient. I have checked that my Mac Preference Region is set to UK and I'm using the current version of Mac OS and Safari.

Does anyone else have this problem or know how to fix it?

Thank you for any suggestions.

Thank you VERY much, Zin. I installed the extension and it worked for Google and for Yahoo searches. I'd never have found that myself.

God. I've got four and a half browsers on my Macbook (Firefox, Safari, Chrome, Opera and Opera Extra) and sometimes it doesn't seem enough. Opera and Opera Extra are the only of those that my bank's Web site doesn't support, and they're the only ones that works with it. I think that's because I tend to have Ghostery installed on my other browsers. I can't use Chrome because every couple of days it causes my MacBook to totally freeze, needing a four-second press on the on/off button to reboot it. That only leaves Safari and Firefox, so I really don't want to have to rule Safari out.

Thanks again, Zin.