In BrE 'gangway' would be used to refer to the passageway from shore to ship but also to the walkways on scaffolding on any sort of building work. It would also be used for the walkways on the scaffolding used on theatre or film sets for the lighting or scene changes. These could also be called 'gantries( gantry)' as would the walkways on the exterior rooves of large buildings such as churches and also walkways in warships or the large engine-rooms of cruise-liners.
In supermarkets, churches, cinemas, theatres, fashion shows, the walkways are always referred to as 'aisles', similar to AmE.
