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Thanks for following the action live from Roots Hall here this afternoon. Monday's Echo will be full of reports, reaction and action photographs from the game. To play your part in the coverage send your views via Twitter to @cjphillips1982
Neil Harris, Millwall manager: "The boys let themselves down, we weren’t good enough and all four goals were a shambles.
"Jermaine Easter also let himself down and more importantly the team after his sending off right before half time, we were second best all over the pitch and it's not good enough.
"The key factor was how we defended. We've conceded more than 50 goals this season and after how we've defended here at Roots Hall I'm not surprised by that statistic.”
Phil Brown, Southend United: “They knew I was a trained electrician and asked me to have a look at what was going on.
“It was nothing to do with the fuses so that ruled me out straight away and I was starting to get a bit worried about whether or not the lights were going to come back on.
“I’ve been told it’s the first time it’s happened here in 50 years so I can’t complain too much but, despite all the good performances out there on the pitch, I think we have to give stadium manager Dave Jobson man of the match for getting the lights on again.
“I was also slightly concerned the game might be abandoned in the second half because of the rain but thankfully that wasn’t the case and this is a fantastic result for us all.
“The players should all be very proud of how they’ve performed and it’s certainly a day for everyone connected with the club to remember.”
Full match report now online here
Bailey, Bailey what's the score echoes round the ground as the two teams leave the pitch!
Full time: Blues 4, Millwall 1
Ryan Leonard burst through the centre of the pitch and slammed a stunning finish in to the top left hand corner of the net from 16 yards.
Blues 4, Millwall 1 (Leonard)
Six minutes of injury time to be played
Mark Phillips on for the injured John White
Freddy Eastwood on for Michael Timlin
Ryan Leonard booked for a foul
Still 10 minutes of normal time to be played here.
Barry Corr heads Anthony Straker's left wing cross against the outside of the left post
Millwall make their last change with John Marquis coming on for Jack Smith
Martyn Woolford booked for kicking the ball away
John White booked for a foul on Martyn Woolford
Marc Laird on for Conor Clifford
Ryan Leonard latches on to a poor clearance and has a 50 yard shot just tipped over the crossbar by David Forde. What an effort that was!
Steve Morison's right wing cross found Martyn Woolford inside the area. He chested the ball down and then volleyed home from 12 yards. Good finish.
GOAL. Blues 3, Millwall 1. Woolford
Millwall make their second change with Fred Onyedinma coming on for Richard Chaplow.
Still half an hour left to go
The game being called off is probably Blues' biggest worry now
The ball broke to Timlin on the edge of the box and he fired home a low, right footed shot.
That was Michael Timlin's first goal since he scored at Plymouth in February 2012.
Blues 3, Millwall 0. Timlin on target
Attendance: 7,923 with 2,212 from Millwall
John White heads just over from Conor Clifford's left wing cross
Quiet start to the second half as the rain pours down.
The second half is underway
So we need the lights to stay on and the pitch to not flood!
It's now hammering down at Roots Hall.
On the plus side, the floodlight failure did allow the ITV cameraman more time to get here!
Not sure I've ever seen a first half where so much has happened!
Blues 2, Millwall 0
Will Atkinson raced on to a Michael Timlin pass. Went through on goal and chipped the keeper.
Blues 2, Millwall 0. Atkinson
Will Atkinson booked for a foul on Lee Martin
Will Atkinson booked for a foul on Lee Martin
Jack Smith now also booked for foul on Conor Clifford.
Five minutes of added on time to be played.
Millwall down to 10 men. Jermaine Easter sent off for stamping on Ben Coker.
Nicky Bailey booked for a foul on Michael Timlin
The lights were out for 15 minutes.
We have lights! The game is back underway
Could be a game of three halves!
The lights are still off as the players leave the pitch
Sources close to the club suggest Blues are now just trying to pay the bill!
The Southend fans have all turned the lights on on their mobile phones to try and light up the ground!
Make that all of the floodlights!
One of the floodlights has gone off!
Will Atkinson's header from Ben Coker's left wing cross parried around the left post by David Forde.
Barry Corr scoring will increase Millwall's anger that he was not sent off.
Barry Corr was picked out by John White's right wing cross and sent a 12 yard header in to the back of the net
Blues 1, Millwall 0. Corr
Blues go close to taking the lead. Anthony Straker shot saved, rebound to Michael Timlin whose shot was blocked. Barry Corr header then also blocked
Smith having his head bandaged
Jack Smith down getting treatment after a clash with Barry Corr. Millwall claiming he was elbowed.
The game is underway
Conor Clifford v Nicky Bailey could be a bit lively in the midfield today!
Three of Southend's players have been told they can't sit in the directors box!
The highlight of the day so far has been the ITV cameraman driving to Southampton instead of Southend!
Millwall: Forde, Dunne, Shittu, Easter, Morison, Bailey, Lowry, Martin, Chaplow, Smith, Abdou.
Subs: Wright, Woolford, Beevers, McDonald, Marquis, Onyedinma & Bywater.
Blues: Bentley, White, Thompson, Prosser, Coker, Clifford, Leonard, Timlin, Atkinson, Corr, Straker
Subs: Smith, Laird, Phillips, Eastwood, Hurst, Payne & Woodrow
Blues boss Phil Brown has made three changes to his starting line up for this afternoon's game against Millwall. Adam Thompson has come in for Mark Phillips in defence, Conor Clifford for Kevan Hurst in midfield and Barry Corr for Cauley Woodrow in attack.