apparently it was a good day to check in after a yearly absence
No i have seen one time or another but i thought it was a test vehicle or similar.
https://sv.wikipedia.org/wiki/Alvis_Stalwart
And i see you found the same sites i did. but nothing else sorry.
https://sites.google.com/view/alvis-...101?authuser=0
Some site i found googling.
https://digitaltmuseum.org/011024259...22+has-picture