10 points if you know what this fence is made of, 15 if you know of it's proper use, 30 if you were around when it was made...
[photographed Sandringham, Feb 2021]
...thinking...
...
Made of steel and I think coated, I believe I have held them in my hands but for the life of me I can not think why. I wondered if they was some sort of ramp? The 'L' tabs on the side make me think they fit into a heavier metal piece.
Most of the drives are around half a day non-stop, so should be time for shooting. Also depends if there is a non-photographer travelling too, they might get bored!

