I have a BQM snapshot with a light blue spike on it:
weird colour (cyan?)
(about midnight). I've never seen that colour before. I guess it is a big spike in average latency.
It worries me there's quite a few "red spikes" of dropped packets, which generally coincide with a largish download or speedtest. I can't see anything in mydslwebstats that shows a line problem; if that's true, can I infer that the packets must be dropped somewhere beyond my exchange, maybe in plusnet-/bt-land?