Sometime ago I read an article that described how the northern "dialect" of the English language becomes hurdle for upwards mobility in the UK. So, to some level there is still friction. And here I am talking about native northern English speakers.
One sign of change though would be accents in adverts and what is being advertised. That I have noticed a change over the decades for the better. Certainly moved on from the days in which everybody was to speak BBC English and best covered https://www.youtube.com/watch?v=bSOh8FEr-1c and https://www.smithsonianmag.com/smart-news/how-north-england-...