Cricketpublished at 18:04 British Summer Time 11 May 2015
It is the first triple hundred of Kevin Pietersen's career - and he bought up the mark in typical fashion, by smashing a huge six.
"Goodness me, that's gone miles," says the commentator on BBC London (listen here). "It's ended up in the middle tier of the stand. It's a huge six. There may be a delay here while we find the ball."
That takes KP to 311, and with no signs of stopping any time soon.
Surrey are 511-9. Can England ignore him after this? Unlikely, whatever the politics of the matter.