When I’m viewing openstreetmap for the midlands of the UK (e.g. https://www.openstreetmap.org/#map=14/52.6900/-1.2088)) the landuse for most of the background appears to be a reservoir (including in cities!). I assume this is an error - could someone please confirm this. I’m not entirely sure how to fix this as the I cannot find the layer in the editor.
Seems there was a problem with the coastline of Britain. So this has made large areas appear to be flooded.
I think this has now been fixed. But it may take a while for all of the map to be updated. Note some zoom levels may update before others. Refreshing your browser may help, in case it has cached the old images.