Postpublished at 15:54 British Summer Time 25 May 2015
So, 36 overs left, five wickets needed by England, 211 runs needed by New Zealand.
If England are to push on to a famous victory (which is more likely than a tourist win right now) they need to break this partnership, which has consolidated well for 73 runs since Ben Stokes did for Williamson and McCullum in successive balls.
It is a huge ask for New Zealand to win this, but the longer Anderson sticks around and playing like he is, the more nervous Lord's will get nervous. But let's not think about that until we have to.