april 1 has heralded a crop of fake news stories hoodwinking readers .
the guardian claims jeremy clarkson is campaigning against fossil fuels .
simon cowell will replace the queen on the £ 5 note , according to the sun .
the leaning tower of pisa is set to become a luxury hotel , says one paper .
ant and dec ` will add strictly 's anton du beke to their presenting line-up '