iPad Internet connectivity lost - help!!!

In the last couple of hours, my fairly new iPad (retina display model - wifi only) has stopped connecting to internet. So safari just says "server not responding" Facebook says "connection error" etc. I am sat less than a metre from my router/modem, where I have been all day (Working - honest) and the macbook which is right next to the iPad is working A ok. In the settings on iPad my wifi network is detected as normal with a tick next to it.

Any thoughts?

 

Problem solved

Problem solved by switching the WiFi toggle to Off then back to On again!!!!