Many common gestures on smartphones and tablets are done with multiple fingers. The need is even more acute when it comes to assistive haptic surfaces for sensory-impaired people who typically use complex bimanual interactions when they interact with tactile screens. A major challenge in the field of surface haptics is therefore the ability to produce localised stimuli, i.e. to stimulate independently multiple skin areas in simultaneous contact with the same surface. This feature is necessary to leverage the extended contact possibilities of multi-finger or whole hand gestures to communicate more expressive and informative feedback.