“Quite when I’m not sure, but there’s a script – a very good script by Alex Garland,” he continued, referring to the screenwriter behind both 28 Years Later and its sequel, The Bone Temple.
Article source: https://www.huffingtonpost.co.uk/entry/danny-boyle-28-years-later-third-film_uk_6abd108ae4b0ecc03a1dc605