On my usual travels on Geograph I found out about
this fantastic survivor in a pay-and-display car park in Loughton in Epping Forest District. This type of installation is still reasonably common around Epping Forest and can be found in short bracket form like this and with long brackets. Answers on a postcard as to the make and model of the lantern please!
I think that is a shallow-bowled version of the ELECO HW745.
For comparison, here is an ELECO HW745 photographed in Bowers Gifford near Basildon, Essex in September 2011...
...and this appears to be the same lantern canopy but with a shallow bowl, photographed on the edge of Hainault (which is still within the boundary of Epping Forest District) in March 2014. This variant of the lantern may of course have a different code.
As you say, there are plenty of these shallow-bowled lanterns on unsleeved concrete columns in the Epping Forest district of Essex, like this one and the ones behind it in High Road, Woodford Bridge. Photograph taken in March 2014.
A close-up of the shallow-bowled ELECO. In line with the rest of Essex, all County Council lanterns in the Epping Forest district have been re-celled for part-night lighting. Photograph taken in March 2014.
Alongside this shallow-bowled version of the ELECO HW745, there are of course other variants , including the
top entry version and
the version with the W-shaped bowl, but I have no idea if these have different codes. I'm sure somebody on UKASTLE will know :)
How strange! I thought SOX lanterns weren't controllable by RF systems? - Being that they need a special ballast that isn't made for SOX, only SON etc.