Chris Maguire sends in a good low cross for the Black Cats but Lewis Morgan can't sort his feet out and it bounces harmlessly wide.

Sunderland's best opening in quite some time.

Andy Vines: Not a goalkeeping error, but who can forget Richard Keogh's beautiful pass to Bobby Zamora?

Loser92: I knew Charlton would win. Sunderland have been in reverse gear since the beginning of March

Derby captain Richard Keogh and all QPR fans are certainly unlikely to have forgotten it...

Sunderland goalkeeper Jon McLaughlin will not be thanking defender Alim Ozturk for giving him a bouncing backpass like that now he's in the same goal where Dillon Phillips made that error in the first half.

He clears easily enough, as Ozturk apologises.

Image source, Rex Features

Charlton get us back under way and they've made a change.

Naby Sarr's day at Wembley consisted of 45 minutes, one own goal and a booking.

Jason Pearce is on.

This is what a play-off final can do to you.

And we've still got at least another 45 minutes to come.

The players are making their way back out for the second half...

Image source, Rex Features

Image source, Rex Features

Image source, Rex Features

Image source, Rex Features

It doesn't get much bigger than the conclusion to the EFL season on Bank Holiday Monday.

If you're talking money terms, then it's top of the tree.

The Championship play-off final between Aston Villa and Derby is worth £170m to the winner, as well as a prized place in the Premier League.

We'll have all the build-up on the BBC Sport website and app from 12:00 BST, followed by match coverage from 15:00.

In the meantime you can read more about the huge prize at stake in a piece Andrew Aloia has written here.

David Robinson: Worst goalkeeping error in the play-offs has to be Phil Barnes for Blackpool v Orient in 2001. After 27 seconds, he slipped whilst controlling a back pass, letting Orient's forward in for simple tap-in. Most of us were still admiring the Millennium Stadium!

Paul Carney: Pleased for Charlton. They were shell-shocked for 30 minutes but finally cleared their heads. Sunderland have no creativity without McGeady.

Andy Brook: The first and only rule of passing the ball back to the keeper - pass it wide of the goal

Image source, Getty Images

That's your lot from an exciting first half at Wembley that will live long in the memory for the mistake above.

There seemed to be little danger when Charlton defender Naby Sarr passed the ball back to goalkeeper Dillon Phillips in the fifth minute but the ball went past Phillips' foot and, despite setting off after it, he could not stop what could be one of the most famous Wembley own goals.

That rocked the Addicks but they grew back into and levelled when Ben Purrington tapped home after fine play.

It's all set up for a brilliant second half. Another 4-4? Don't rule it out.

We're into three minutes of stoppage time.

Can anyone take a lead into the break?

Rob Stevens
BBC Sport at Wembley

That is not a bad time for Ben Purrington to pop-up with his first goal for Charlton.

Addicks goalkeeper Dillon Phillips will no doubt be thanking the on-loan left-back at half-time as it means his early error won’t prove to be the defining moment of the game.

The Charlton fans have been singing non-stop since the equaliser, backed by the beat of a drum in their end.

Image source, Rex Features

That's Lewis Morgan off free-kicks then.

The Celtic loanee blazes miles over.

Naby Sarr's day gets a little worse as he picks up the first booking for upending Sunderland captain George Honeyman on the edge of the area.

Steve Claridge
Ex-Premier League striker on BBC Radio 5 live

Thinking of ways to describe both goals, it's all the qs, one quirky and one quality. That Charlton goal had quality throughout it; a good pull-back by Lyle Taylor and its no more than they deserve.

After they scored, Krystian Bielik has given his goalkeeper a cuddle and said to him 'we're back in this'.

Sunderland win another corner as Bryan Oviedo gets some revenge on Lyle Taylor with some quick feet.

Grant Leadbitter sends a delivery to the back post and Addicks goalkeeper Dillon Phillips claws it away.

The corner comes to nothing as Charlie Wyke is pulled up for a foul on Charlton striker Lyle Taylor.

Taylor is having a brilliant game so far it has to be said.

Charlton have been well on top for the past 15 minutes or so and they now have the goal to show for it.

Sunderland have now got to respond and they have a corner. Their first of the game.

Lyle Taylor wins another corner for the Addicks. The striker is giving Black Cats left-back Bryan Oviedo a tough time right now.

Josh Cullen sends the set piece in over everyone and out for a throw in.

Boss Lee Bowyer will not have been happy about that.

Image source, Getty Images

Thirty minutes in and, that aberration from Charlton defender Naby Sarr and Dillon Phillips aside, it's been pretty even.

The Addicks have come back into in the last few minutes but they're yet to trouble Black Cats goalkeeper Jon McLaughlin.

Image source, Getty Images

Sean the Blue: It's a play-off final, concentration levels must be 100% from the first to last whistle, just shows what happens when they're not at 100%.

Any other goalkeeping blunders you can think of in major finals? Let us know.