Vintage Liverpool Wardle 4000 200w SOI/H

Showing the whole Concrete Utilities "New Highway" column with a steel top & outreach arm and a modern SON lantern next to it.
I've had a look on Google Streetview and the WRTL Arc on the left replaced an identical lantern sometime between April and July 2015.

For a while I have noticed that on Queens Drive road in Liverpool, there have been quite a few of these old low pressure sodium lanterns dotted about and still kicking.
I never did find out what they were but as more and more seem to be being replaced I thought I might as well get out there and grab a few photos while I still could.

*Edit* Turns out these were made by Wardle and are No 4000 series lanterns made in the early 1960's originally for 200w SOI lamps!

Queens drive is a history lesson of streetlighting in itself, there is a right mix and match of lanterns as there has been various piecemeal replacements over the decades.
You have these lanterns, then you have "modern" SOX replacements like G.E.C Z9555's and then later Philips MA50's. There are also an absolute cornucopia of SON lanterns and then finally, their contemporary LED replacements.