"He's not entitled to receive light laterally" Nationwide reported on a rather unusual form of taxation.
A short from the BBC on the "window tax" applied to Scarborough residents overlooking BR land
Now - I seem to recall a thread regarding a photo showing boards erected between railway land and houses but cannot find it.
Is this one and the same location?
The logic is actually perfectly sound. By the residents acknowledging that they did not have a right to light it allowed BR to construct on their land and block light without issue should they have ever wanted to.
Similar policies are applied to road and paths to prevent them becoming "continual use" - a good example being the road to Faslane which is closed for one day a year https://www.sabre-roads.org.uk/wiki/index.php?title=A817