Page:UK Traffic Signs Manual - Chapter 8 - Part 1 (Traffic Safety Measures and Signs for Road). Designs 2009.pdf/126

 *a high intensity warning light should be placed at the location between the end of the lead taper coning and the start of the parallel coning. It should be placed at the end of the "lane closed" barrier to diagram 7105 next to the "keep left/right" sign to diagram 610 facing the oncoming traffic; and 125
 * if the remaining single carriageway is 5.5m or less, then a high intensity warning light should be placed at the location between end of the parallel coning and the start of the exit taper coning. It should be placed above the coning facing the opposing oncoming traffic.