In message , at 14:49:12 on Thu, 19
Mar 2020, charles remarked:

I presume street lights are billed to the local council according to
number of hours that the timer turns them on and the rated power of each
light (which varies with technology eg sodium versus LED) - unless each
lamp-post has its own meter.

working (as a student) with SESEB, the substations often provided a
separate street light supply with the time clock in the substation.

Yes, they generally have a completely separate supply (from the
households) in effect a 13A extension cord from one lamp-post to the
next, and next...
--
Roland Perry