A flexible pipe comprising: an inner liner formed as a tube and having an inner surface defining an inner diameter, the inner liner formed of a material including a thermoplastic; a reinforcement layer including at least a first ply (16, 22) of reinforcing tape helically wrapped in a first helical direction about the inner liner and a second ply (18, 24) of reinforcing tape helically wrapped about the first ply (16, 22) of reinforcing tape in a second helical direction opposite to the first helical direction; and an outer jacket applied over and bonded to the reinforcement layer, the outer jacket including a thermoplastic; characterised by: the first ply (16, 22) of reinforcing tape and the second ply (18, 24) of reinforcing tape each comprising a reinforcing tape including glass fiber reinforcements in a matrix composition, the matrix composition including high density polyethylene and a maleic anhydride grafted polyethylene in an amount of 8% to 20% by weight of the high density polyethylene; wherein the first ply (16, 22) of reinforcing tape is bonded to the second ply (18, 24) of reinforcing tape by melt fusion of the high density polyethylene in the reinforcing tape; wherein the reinforcement layer is bonded to the inner liner by melt fusion of the thermoplastic in the inner liner and the high density polyethylene in the reinforcing tape; wherein the outer jacket is bonded to the reinforcement layer by melt fusion of the thermoplastic in the outer jacket with the high density polyethylene in the reinforcing tape; the pipe having an inner diameter of 125 to 600mm; and the reinforcing tape having a thickness of 0.6 to 1.5 mm and a width of 25 to 40% of an outer diameter of the pipe. an inner liner formed as a tube and having an inner surface defining an inner diameter, the inner liner formed of a material including a thermoplastic; a reinforcement layer including at least a first ply (16, 22) of reinforcing tape helically wrapped in a first helical direction about the inner liner and a second ply (18, 24) of reinforcing tape helically wrapped about the first ply (16, 22) of reinforcing tape in a second helical direction opposite to the first helical direction; and an outer jacket applied over and bonded to the reinforcement layer, the outer jacket including a thermoplastic; characterised by: the first ply (16, 22) of reinforcing tape and the second ply (18, 24) of reinforcing tape each comprising a reinforcing tape including glass fiber reinforcements in a matrix composition, the matrix composition including high density polyethylene and a maleic anhydride grafted polyethylene in an amount of 8% to 20% by weight of the high density polyethylene; wherein the first ply (16, 22) of reinforcing tape is bonded to the second ply (18, 24) of reinforcing tape by melt fusion of the high density polyethylene in the reinforcing tape; wherein the reinforcement layer is bonded to the inner liner by melt fusion of the thermoplastic in the inner liner and the high density polyethylene in the reinforcing tape; wherein the outer jacket is bonded to the reinforcement layer by melt fusion of the thermoplastic in the outer jacket with the high density polyethylene in the reinforcing tape; the pipe having an inner diameter of 125 to 600mm; and the reinforcing tape having a thickness of 0.6 to 1.5 mm and a width of 25 to 40% of an outer diameter of the pipe. the first ply (16, 22) of reinforcing tape and the second ply (18, 24) of reinforcing tape each comprising a reinforcing tape including glass fiber reinforcements in a matrix composition, the matrix composition including high density polyethylene and a maleic anhydride grafted polyethylene in an amount of 8% to 20% by weight of the high density polyethylene; wherein the first ply (16, 22) of reinforcing tape is bonded to the second ply (18, 24) of reinforcing tape by melt fusion of the high density polyethylene in the reinforcing tape; wherein the reinforcement layer is bonded to the inner liner by melt fusion of the thermoplastic in the inner liner and the high density polyethylene in the reinforcing tape; wherein the outer jacket is bonded to the reinforcement layer by melt fusion of the thermoplastic in the outer jacket with the high density polyethylene in the reinforcing tape; the pipe having an inner diameter of 125 to 600mm; and the reinforcing tape having a thickness of 0.6 to 1.5 mm and a width of 25 to 40% of an outer diameter of the pipe.