An aircraft passenger seat unit, configured for use adjacent an aisle of an aircraft cabin, wherein the seat unit comprises: - a seat comprising a seat pan and backrest and having an upright sitting configuration in which the backrest is substantially upright, - an aisle side that is configured to be adjacent the aisle, in use, - a foot well, - a footrest positioned within the foot well, - a wall, and - a moveable panel positioned along the aisle side of the seat unit when in a closed position, characterized in that: the foot well is defined by the movable panel which is movable with respect to the footrest between the closed position in which the movable panel at least partially encloses a side of the footrest to block access to the side of the footrest from the aisle and an open position in which the movable panel at least partially exposes the side of the footrest such that, in use, when the panel is in the open position, a passenger can access the seat unit from the aisle through the partially exposed side of the footrest, wherein the movable panel and the wall are spaced apart along the aisle side of the seat unit when the movable panel is in the closed position such that the space between the movable panel and the wall defines a passenger access path into the seat unit from the aisle side of the seat unit, and wherein the seat is movable in the upright sitting configuration between a first position in which the seat pan is spaced apart from the footrest by a first distance, and a second position in which the seat pan is spaced apart from the footrest by a second distance, the second distance being less than the first distance and no more than 15 centimetres. - a seat comprising a seat pan and backrest and having an upright sitting configuration in which the backrest is substantially upright, - an aisle side that is configured to be adjacent the aisle, in use, - a foot well, - a footrest positioned within the foot well, - a wall, and - a moveable panel positioned along the aisle side of the seat unit when in a closed position, characterized in that: the foot well is defined by the movable panel which is movable with respect to the footrest between the closed position in which the movable panel at least partially encloses a side of the footrest to block access to the side of the footrest from the aisle and an open position in which the movable panel at least partially exposes the side of the footrest such that, in use, when the panel is in the open position, a passenger can access the seat unit from the aisle through the partially exposed side of the footrest, wherein the movable panel and the wall are spaced apart along the aisle side of the seat unit when the movable panel is in the closed position such that the space between the movable panel and the wall defines a passenger access path into the seat unit from the aisle side of the seat unit, and wherein the seat is movable in the upright sitting configuration between a first position in which the seat pan is spaced apart from the footrest by a first distance, and a second position in which the seat pan is spaced apart from the footrest by a second distance, the second distance being less than the first distance and no more than 15 centimetres. wherein the movable panel and the wall are spaced apart along the aisle side of the seat unit when the movable panel is in the closed position such that the space between the movable panel and the wall defines a passenger access path into the seat unit from the aisle side of the seat unit, and wherein the seat is movable in the upright sitting configuration between a first position in which the seat pan is spaced apart from the footrest by a first distance, and a second position in which the seat pan is spaced apart from the footrest by a second distance, the second distance being less than the first distance and no more than 15 centimetres.