An improved screwed fastening system for railway rails is proposed to allow rail fastening clips 2, 2000 to be moved onto and off the rail 4 more easily, facilitating track installation and maintenance. One improvement comprises providing in the screwed fastening system a clip guiding device 1000, for guiding the rail fastening clip 2 whilst it is being driven, which has an asymmetrically-located hole 1016 for receiving the screw-threaded shank of a screwbolt 3. Another improvement comprises providing in the screwed fastening system a rail fastening clip 2000 and screwbolt assembly 3000 which have inter-engaging driving portions 2201, 3305. In each case, rotation of the screwbolt 3, 3050 in one direction brings about translational movement of the rail bearing portion 23, 2300 of the clip 2, 2000 away from the screwbolt 3, 3050, and rotation of the screwbolt 3, 3050 in the opposite direction brings about translational movement of the rail bearing portion 23, 2300 of the clip 2, 2000 towards the screwbolt 3, 3050.