Could not scan for wireless networks?

So, I got my iPhone 4s brand new from apple.com (UK) on christmas day, from then I had no problems at all with the iPhone although a week or so ago I lost my connection to WiFi. When you go to Settings>WiFi usually you will be given quite a few options ( your own WiFi and neighbours), this has always worked for me but now it doesnt, I get the message 'Could not scan for wireless networks'. I've looked in the forums for resolutions but nobody seems to have any although this problem is popping up for quite a few people! I dont have access to an apple store for help from an assistant which makes my situation even worse! I have never dropped my iPhone 4s and have never put it in water either, so has anybody ever had this problem and found a fix?

I have also tried reseting my iPhone completely and done the same with my wireless 02 router! Turning on and off again, most things you could think of i have tried! Any help would be greatly appreciated! Thanks alot