The article and nobody in these comments, seems to even acknowledge, the fact that the two characters wake up in hospital copies Day of The Triffids, something Danny Boyles acknowledges, and probably everyone involved in the Walking Dead is aware of. It might be a British Book but it'd pretty well known world wide, I mean at one point there was going to be an American TV series before both of these, which would have added to the now two TV series, one film, and the many radio adaptions around the world