Anderson's innings is now the longest by a No11 in Tests. India are very gracious visitors.
A single from Root brought up yet another record for these two.
They look like they could keep going all day too.
The partnership is now worth 164.
Binny into the third over of his spell. Can he bring an end to India's suffering?
England were 298 for 9 at one point. That was a different Test match though.
FOUR! Anderson drives uppishly but through the gap at midwicket. He is having a ball out there in the middle.
A single takes him to 75. Can he make a quite remarkable hundred? Doesn't seem impossible, or even improbable, at this stage.
Seven runs from that Binny over. England's lead is now in double figures at 14.
Jadeja begins his 35th over. He has taken NO wickets. He also has a slip, silly point and a leg slip to Anderson.
An easy single to point is the result.
Anderson has a wild slog at Jadeja. An inside edge sends the ball looping off his boot to land safely between bowler and keeper.
After 138 overs, England is 474 for 9, with Root on 138 and Anderson on 76.
Binny continues. He beats Root with a wide one outside off.
Root happy to take a single off the second ball of the over. Has he decided to trust Anderson a little bit more?
FOUR! Binny marginally too full and Root drives him elegantly through the covers.
Six from that Binny over. We might get two more overs before the lunch break.
This is Root's third-highest score in Tests.
England just 20 away from 500. Who would have thunk it?
Ishant Sharma has returned for a final fling before the break.
FOUR! Everything going England's way. Anderson drives on the up and the ball races through gully off a thick edge.
And that is lunch. Anderson and Root walk off to deserved applause from this ground.
At lunch on day four, England is 485 for 9, with Root on 143 and Anderson on 81.
India began this session thinking about wrapping up England's innings quickly and then setting batting targets.
Instead, England have kept India in the field and taken a first-innings lead of 28. Only India can lose the match from here.
We are going to take a short break of about 30 minutes. Join us after that to see if James Anderson can become the first ever Test No. 11 to make a century.
Joe Root and James Anderson are walking back out to the middle. They have so far spent 48.3 overs in the middle together.
India will be hoping that lightning strikes again after a break, as has been a pattern in this Test.
The middle session has also been the most successful for the bowlers from either side to this point.
The game has gone mad, says Nasser Hussein.
Bhuvi starts things off and Root clips him off his pads for two runs.
Whatever the plan was before lunch, don't change it, says Hussein.
The partnership is up to 190 now. It is the best in this Test by some distance.
Ishant starts at the other end.
FOUR! Ishant is too full to and Root eases him down the ground to get to his 150. Taken him 283 balls and includes 15 fours.
Root swipes at a wide one and everyone in India thinks he has nicked it. The umpire doesn't move though and Ishant has some choice words for Root, who gets upset and follows Ishant down the pitch mouthing his own reply.