As you may have heard, our biggest-ever musical exports celebrated 40 years in business at the weekend.

Sunday marked the 40th anniversary of Larry Mullen sticking a note to the school noticeboard looking for members.

Of course, given U2's extraordinary success over the last four decades, it was only right that Bono and co. should mark the occasion.

They posted a joke video to their Facebook page that showed the four of them sitting around a table, looking fairly despondent and celebrating 'The Larry Mullen Band's birthday...

Watch it below (click image to play):