A barrier net (12) across a space defined by the fuselage (6) of an aircraft and a floor (7) of the aircraft comprising a first plurality of parallel lengths (13) orientated in a first direction transverse to a second plurality of parallel lengths (14) orientated in a second direction wherein the lengths (13, 14) have fastening means at each end which provide a means for fastening the net to attachment points on the aircraft fuselage (6), characterised in that neither the first nor the second plurality of lengths (13, 14) is parallel to said floor (7).