In the English House of Commons, a narrow aisle across the house, below which sit those who do not vote steadly either with the government or with the opposition
The gangway is the passage between rows of seats, for example in a theatre or aircraft, for people to walk along. A man in the gangway suddenly stood up to reach for something in the overhead locker. = aisle
Flexible connection between passenger carriages to enable passengers and train crew to pass from one carriage to the next whilst the train is in motion