The film was shot on location across Norfolk, UK over 3 years. Of that time it was ten days shooting, about twenty days writing (the 1st draft was written in 7 days), the rest of the time was location scouting, casting and even crowdfunding (a story for another trivia tidbit later). The final film differs from the original draft, though elements of those drafts do exist in the final cut. The Last Day has had numerous re-writes, but this wasn't down to the quality of the script, this was due to changes in locations, budgetary limitations and plenty more tales of the unexpected (again more tidbits for later).
Andy Blithe and Adi Thompson would later work together in Buying Time (2024)