An update on the lighting in my local Sainsbury's car park:
All but one of the remaining SGS203s around the edge of the car park have been retrofitted with Stela Rounds (or whatever
these lanterns are) with anti-glare shields fitted, despite them being under trees, to prevent glare into the windows of the houses at the top of the embankment around the edge of the car park. The sole surviving SGS203 in the car park is tucked away in a far corner, by the motorcycle parking area and cash machine (it's just about visible under the trees
here). It being slightly hidden is probably why it's survived. What looks like a TRT Aspect has also appeared as a casual replacement for an unknown lantern (itself a casual replacement of an SGS203) lighting the entrance to the delivery bay (it's completely shrouded by trees in the 2021 Streetview, so there's no point in me posting a link to it). The SGS203s lighting the long access road to the store are still clinging on.