AEC charabanc c1920

Phone number HOP 2403 indicates a Southwark or Bermondsey company, which would tie-in with the sender and addressee in Peckham and Greenwich respectively. I have tried to blow up the company name which I am fairly sure is under the 12mph limit notice - but without success.
There's an interesting mix of faces and outfits - driver & guide, with the cap & hat band. Was there a nurse or catering assistant with the headscarf next to the 'guide'? Who was the sharply dressed young man standing beside and what about the man in white?
I haven't a clue about the location - it could be the starting point for the outing or the destination - who knows?
Added to the Vintage Photo Theme Park, as I think that it is probably the most popular (most visits) of my vintage photos that has not already been exhibited in VPTP. Which is curious as it only has two 'likes', is not in many groups and most of the visitors are anonymous. Perhaps it got linked onto social media somewhere.