O2's network is suffering outages around the capital and the southeast, with customers unable to make calls, or connect to data services, since just after midnight.
The outage seems to be knocking out connectivity in North and East London as well as Sussex and Kent, and started just before one o'clock this morning. Some customers report being able to get data connections, even when voice disappears entirely, but many users of O2's network and its MVNOs are off the net entirely.
Those Virtual Operators include GiffGaff and Tesco Mobile, which are both suffering from the same outage as they're carried on O2's infrastructure. GiffGaff has even posted a useful map showing which areas are working and which aren't.
O2 tells us that it has engineers working on the problem, though we're waiting to hear the details of what's gone wrong. ®