A few days ago I emailed Trinity House, regarding the proposals by TDC to paint the lighthouse at Margate red and white which is the same colours Trinity House use and as to whether this is permitted. This is the reply.
"The painting of lighthouses in a red and white colour scheme is not unique to Trinity House - it is a practice used world wide. The idea of painting a lighthouse in these colours is to help them stand out against their background to provide what we term a 'day-mark'. This is why the current Beachy Head lighthouse is painted this way in order that it stands out against the white cliffs behind it. A mariner would be informed of these changes before they went ahead and they would then use other factors to double check that the lighthouse they were looking at was the one they thought it was. Vessels should have an approximate idea of where they are at any stage and part of the process of approving such things as lighthouse painting means thatTrinity House are consulted on changes like this. In this case, Trinity House would not grant permission for a lighthouse to be painted in this way if there was already a lighthouse painted the same way nearby with whom its identity could be confused.
I hope this helps. "
Communications OfficerTrinity House