For the first time, London’s famous Coventry Street is decorated with Ramadan ornaments, marking the start of the Islamic holy month in the UK. Photograph: Anadolu Agency/Getty Images

Around one quarter of the world’s population expected to observe the Islamic holy month and many will fast from sunrise to sunset.  When is Ramadan and who takes part in fasting?

Children hold ‘Ramadan lanterns’ in their hands and move around the streets of Mosul, Iraq. Photograph: Anadolu Agency/Getty Images