A seating installation for a passenger vehicle, especially an aeroplane, the installation comprising a plurality of seat units, each seat unit having a back, two opposite sides and comprising a seat, which seat has a back-rest and a seat-pan and defines a longitudinal seat axis. The plurality of seat units are arranged in two adjacent files, each file defining a file axis, and the seat units in each file being oriented such that the axis of each seat unit subtends an acute angle with the respective file axis and being offset from one another along their respective seat axes to form at least one bay in each file behind the back of at least one seat unit and to one side of an adjacent seat unit in the same respective file, the seat units in the two respective files being staggered with respect to one another and the two files being disposed relative to one another such that at least one seat unit in each one of the files nests partially within a corresponding bay of the other file such that the seat units in the two respective files are arranged generally back-to-back with one another; and wherein each file comprises a succession of shields that are spaced along the respective file axis, the space between each pair of adjacent shields accommodating a respective seat of the file, the shields forming side screens for the seats, and the shields being configured and arranged such that a portion of at least one shield in each one of the files extends between two adjacent shields in the other file to form a rear screen for a corresponding seat in said other file disposed between the two adjacent shields.