Aldo Godolfus' hand is covered in ash before he touches his burnt bed, indicating a retake.
Joe Hasham did not appear naked on-set during his character's nude scenes. The camera is positioned slightly too low down during Don's post-beach shower, inadvertently revealing that he's wearing a pair of swimming trunks. They can be seen again later when he gets out of bed.
Although the script (and DVD subtitles) spell Aldo's surname "Godolphus", the sign on the delicatessen window always reads "Godolfus".
At the end of the movie, the closing credits for the residents of Flat 7 (Vera) and Flat 8 (Alf, Lucy and Arnold), although presented in the same style as the TV series, are accidentally transposed.
The boom mic's shadow is clearly visible on Flat 3's wall as Dorrie Evans and Flo Patterson return from bowling, just before Horace Deerman appears from the bathroom.