A Side Street in Marlborough, Wiltshire

You rightly observe that Marlborough is an oasis of privilege. Although the cost of housing is well beyond the ordinary pocket, there are nonetheless ordinary people to be found. Maybe they are bussed in from distant parts to serve the needs of the wealthy locals. Rich or poor, social manners in Marlborough are above average. There is hardly any litter and good pavement etiquette when encountering others. There is a useful Oxfam bookshop. Maybe you were there; if not, you could visit again!