Interesting article in the Economist today which analyses data released by Citymapper to show how people moving around different cities it operates in have changed from normal patterns. It seems to confirm that Londoners were out and about this weekend far more by foot and public transport than in other European cities. Appreciate that the demographic that use Citymapper may be skewed but presumably it's a fair comparison of its users across different cities.
The article is behind a paywall and is copyrighted, but the key conclusion is:
Though mobility has fallen during the last fortnight in all 40 cities, there are considerable regional differences. Seoul and Tokyo had already experienced significant declines by the start of March, and have stabilised since then, as the spread of the virus has slowed. Australia and Russia are still operating at close to 50% mobility, with few deaths recorded there yet. Western Europe and North America have seen the sharpest declines, as the virus has claimed hundreds of lives in several countries. But among places where the death toll has reached that high, Britain is an outlier. On Saturday mobility in London, Manchester and Birmingham hovered around 25%. New York was at 10%, with Rome, Paris and Madrid all at 5% or below.