all 4 of these memorial / street lamps have the following tags. I suspect an error was made.

highway=street_lamp
historic=memorial
inscription=In Memory of Archibald Calder Priest DSO MA. Mus.B. (1924) Given by his son Douglas Calder MA. LL.M (1961) On the Feast of St. Catharine 2000
source=survey
start_date=2000
