The sleeper seats are shown in sleeping mode. Each comprises a head rest, a back rest, a seat pan or seat cushion and a leg rest, all of which move in a conventional manner when the seat is moved from sleeping mode to sitting mode. The seats also include ottomans. Further they have inter-seat dividers between the individual seats within the their column. The six seats are arranged in a chevron formation or array and two columns. All the seats in each column are parallel with each other and have central axes A set at a “herringbone” angle α to the column direction and in particular to a longitudinal axis 10 of the array.