Road safety rail systems and parts and fittings therefor

A moving energy absorbing component comprising:

• at least one formed terminal end (FTE) rail, wherein the at least one FTE rail includes a twist from a primarily vertical orientation to a primarily horizontal orientation, whilst maintaining a horizontal axis at the same set height above ground level;
• and wherein the at least one FTE rail bends down from a set horizontal axis height above ground level (Y) to a horizontal axis height being at, or near ground level;
• an impact head including a base and upright projection, the base comprising an axial orifice extending from a downstream entry point to an upstream exit point, through which an upstream terminus of an FTE rail is passed;
• wherein a top portion of the upright projection on the impact head is connected via at least one beam to a post detacher element located downstream of said impact head a pre-determined distance therefrom.