Poor visibility of lights on approach lead to slow traffic flow

As drivers approach the Flimwell lights on the southbound A21, the first light seen - and the only one seen until 50m from the junction - is the right turn filter for the junction. See photo from near the pub. This light is most often (correctly) at red but is a major cause of confusion for drivers who assume the whole junction is at red for them when in fact the ahead and left turn lights may be at green. But these are unseen so the result: drivers dawdle up to a green light. This I believe is a major source of tailbacks. The solution would be to simply duplicate the ahead signals on the pole carrying the right turn filter so that the green can be seen. Thanks for your attention and please let me know how to contact you if I can provide more evidence.