Decades after George A Romero scared the life out of cinemagoers with the classic zombie horror Night of the Living Dead (1968), the movie world has been plagued again with shambling corpses.

BBC: Dawn of the Dead (2003)

So why are the new crop of zombie films keeping me up at night?

FORBES: Why Zombies Are Killing Me

It is five o'clock in the morning and in a scene that would not look out of place in a zombie film, bleary-eyed youngsters, with fixed stares and many still clad in their night clothes, stagger into a leisure centre in west London.

BBC: Decision time for British swimmer Achieng Ajulu-Bushell