Living standards have improved for many, but at the expense of others through exploitation. Like you say, an age old story. We’re just incredibly lucky to catch a period in the history of mankind where the improvements have benefitted more than just the rich/elite.
Alas I can’t find any news reports in the UK stating hundreds of thousands, that’s a really significant number of people for the UK, rather tens of thousands. Last year saw 300,000 pro Palestine protesters head to London, but it appears to be an over-‘estimation’ for this protest. Great to see people still going out in the UK though.