BBC Red Button
If you've missed any of today's action, you can watch highlights on BBC Red Button & online from 21:30-22:30 BST or on BBC Two at 23:15 BST.
Today's play is winding up at Woburn, but there's more to look forward to on Friday of course.
Have a look at the second-round tee times here.
A great way to end the day for the world number one.
She taps her birdie putt straight at the pin to end the day three behind leader Ashleigh Buhai.
Ko's bid to win a third major in a row is looking good.
A quick look at the few who have managed to break the -5 barrier:
Ashleigh Buhai -7
Danielle Kang -6
Hinako Shibuno -6
Charley Hull -5
Moriya Jutanugarn -5
Park Sung-hyun -5
It's almost a perfect end to the day for Ko Jin-young as her approach hits the pin and bounces across the hole.
Looks like she could still end the day with a birdie.
American Megan Khang was on track to tread the hallowed five under ground, until a bogey on the 11th halted her progress.
The world number 44 is back in business after a birdie on the 12th though.
Ko Jin-young sends her tee shot straight down the middle of the 18th.
Can she squeeze one more birdie out of this course?
Georgia Hall doesn't fall into the bogey trap and lands her par putt to finish on three under. A great start.
And Korda lips out with her par putt!
Nelly Korda can't get to four under on the 17th either.
There seems to be something in the air at Woburn this afternoon.
Ko Jin-young's attempt on the 17th goes left too.
The players who went out this morning seemed to find it much easier to get birdies out of these last few holes...
There's a big crowd around the 18th to watch Georgia Hall come in.
She can't treat them to a birdie as her putt curls left.
And it's a similar story for Ko Jin-young on the 17th.
The world number one's tee shot goes left and keeps rolling. A par could even be a big ask.
Georgia Hall's second shot on the par-four 18th lands to the far right of the hole.
The defending champion probably won't be able to end the day with a birdie, but it's been a very solid round.
Nelly and Jessica Korda aren't the only sisters at the British Open.
Thailand's Ariya Jutanugarn birdies the 18th to finish the day just one shot behind her older sibling Moriya.
Former ANA Inspiration champion Morgan Pressel keeps her cool to save par on the 14th and stay on -4.
Fun fact, Pressel played in her first US Open at just 12 years old.
Ko Jin-young misses out on back-to-back birdies by an inch.
Just a par on the 16th.
Nelly Korda's shoes say 'pray for birdies' on them.
They've not done the job, though. Her putt is off line and curls too far left.
European Solheim Cup captain Catriona Matthew finishes off with a par on the 18th.
Wonder what the Scot has made of some of the European performances today. She's keeping her eye out for wild cards.