Unlike Virgin, BT’s provided data about the network as a whole rather than the average used by individual customers. It said the surge it saw, driven by both the Call of Duty patch and the live streaming of four European football games, hit a peak network traffic of 20.86 Tbps (terabits per second). It had seen Christmas peaks of above 21 Tbps.

https://www.bbc.co.uk/news/technology-56281224