The magnitudes of interactions between adjacent storage cells aligned along the easy-axis direction have been measured for various values of easy-axis skew and cell spacing, for both continuous film and film spots on aluminium substrates. Interactions are significantly smaller when film spots are used in place of continuous film. Experiments designed to establish the various causes of interactions with film spots and continuous film are described. Some observed effects due to stray fields have magnitudes five times those expected from simple theory. The comparatively large distances over which interaction effects occur in continuous film is attributed to domain propagation during the writing operation, giving variable demagnetising fields and variable proportions of flux linked by the sense conductor.