Do a quick trace and you'll find yourself going through LINX/RapidSwitch after a few hops? Been giving BE problems since the 17th on and off, although it's only people going through the dodgy switch (like me) who've had issues. It was meant to be fixed last night but the packet-loss/bad pings have come back again today.
The
usergroup or better, be forums usually have line issues on them.