Paul The Archivist has commented on the following diary entries
|OS OpenData Street View in JOSM||about 6 years ago||
Sometimes I've found after waiting a while I still have a black screen, or I have 'Exception occurred' red tiles. When this happens I delete the WMS from the layers panel (at the top right) in JOSM, and reload it - it often seems to work the second time. I usually adjust my position on the map and zoom level before reloading it - but I'm not sure that is necessary.