An aircraft cabin comprising a passenger seating arrangement, the passenger seating arrangement comprising a first column of seat units and second column of seat units, the first and second columns (C1, C2) being separated by an aisle, and the columns of seat units and the aisle all extending in a longitudinal direction parallel to the longitudinal axis of the aircraft cabin, and wherein each column (C1, C2) comprises a multiplicity of pairs of seat units, the pairs of seat units being arranged consecutively along the longitudinal direction, each seat unit being configurable between a seating configuration and a flat-bed configuration, wherein each pair of seat units comprises: an inwardly facing seat unit angled at an acute angle to the longitudinal axis of the aircraft and facing inwardly towards the aisle; an outwardly facing seat unit angled at the same acute angle to the longitudinal axis of the aircraft but facing outwardly away from the aisle; the inwardly and outwardly facing seat units (11a, 11b) bordering each other along a shared boundary, and wherein the first column is positioned adjacent a sidewall of the aircraft cabin, and the second column is positioned adjacent either a second aisle or the opposing sidewall of the cabin, wherein each seat unit comprises a main body and a foot receiving end, the main body comprising moveable seating elements arranged such that when the seat unit is in the seating configuration the seating elements form a passenger seat but when the seating unit is in the flat-bed configuration, the seating elements form a substantially flat sleeping surface, and the foot receiving end being configured to receive a passenger's feet when the seat unit is in the flat-bed configuration, the foot receiving end comprising a wall extending along at least part of a perimeter of the foot receiving end, and wherein each column (C1, C2) comprises a plurality of main body modules, and a plurality of foot modules, characterised in that each main body module is formed of the main bodies of each of the seat units in a pair of seat units, and each foot module comprises the foot receiving end of an inwardly facing seat unit of one pair of seat units, and the foot receiving end of the outwardly facing seat unit in an adjacent pair of seat units, and the main body modules and the foot modules are independent structures and are alternately located along the longitudinal direction of each column (C1, C2). an inwardly facing seat unit angled at an acute angle to the longitudinal axis of the aircraft and facing inwardly towards the aisle; an outwardly facing seat unit angled at the same acute angle to the longitudinal axis of the aircraft but facing outwardly away from the aisle; the inwardly and outwardly facing seat units (11a, 11b) bordering each other along a shared boundary, and wherein the first column is positioned adjacent a sidewall of the aircraft cabin, and the second column is positioned adjacent either a second aisle or the opposing sidewall of the cabin, wherein each seat unit comprises a main body and a foot receiving end, the main body comprising moveable seating elements arranged such that when the seat unit is in the seating configuration the seating elements form a passenger seat but when the seating unit is in the flat-bed configuration, the seating elements form a substantially flat sleeping surface, and the foot receiving end being configured to receive a passenger's feet when the seat unit is in the flat-bed configuration, the foot receiving end comprising a wall extending along at least part of a perimeter of the foot receiving end, and wherein each column (C1, C2) comprises a plurality of main body modules, and a plurality of foot modules, characterised in that each main body module is formed of the main bodies of each of the seat units in a pair of seat units, and each foot module comprises the foot receiving end of an inwardly facing seat unit of one pair of seat units, and the foot receiving end of the outwardly facing seat unit in an adjacent pair of seat units, and the main body modules and the foot modules are independent structures and are alternately located along the longitudinal direction of each column (C1, C2).