Derby boss Frank Lampard said his players "deserved" their moment in the spotlight after forcing Theresa May's speech to be moved from BBC One.

Lampard's Rams recovered from a two-goal deficit to edge past Premier League Southampton 5-3 on penalties in a thrilling FA Cup third-round replay at St Mary's.

The late running of the televised game caused a programme clash, with Prime Minister May moved to BBC Two as she addressed the nation after she fought of a vote of no confidence in the Commons.

Lampard, whose side will face League One Accrington in the fourth round, said: "I did hear that. What did she say in the end?

"I'm pleased for the players. The BBC is a big audience and when you are playing in front of a big audience, we work hard here to put in good performances.

"It's nice for that to be out there, they deserve those moments.

"Theresa May will have many a moment coming up over the next few weeks, I would say, so let's not worry about that!"

The Rams, who came from two goals down to draw the original game 2-2, looked to be heading out after quick-fire second-half strikes from Saints duo Stuart Armstrong and Nathan Redmond.

But they repeated the trick thanks to a Harry Wilson free-kick and Martyn Waghorn's header before captain Richard Keogh converted the decisive spot-kick following a woeful miss from Redmond.

County were also denied a first-half opener after Craig Bryson's goal was chalked off for offside following a lengthy consultation between match official Anthony Taylor and the Video Assistant Referee.

Striker Waghorn, who passed the ball to Bryson, was marginally offside, with the decision to disallow the strike taking more than two minutes.

Lampard said: "It was a bit of a lack of speed but I don't kind of mind that. I think we are going to have to get used to that.

"We had a meeting this morning with a referee and he explained it to us and showed us why it takes so long. And I don't mind it, if they get the decision right.

"What is right? I haven't looked closely enough – it seemed like it was millimetres. I think it certainly needs to be worked on, it's certainly not perfect at the moment."

Speaking about the comeback, the former England international said: "It was great fun, well deserved – I don't think anyone can take that away from us because the quality and character was there in abundance.

"From 2-0 down, a good bit of character to turn the game. I'm delighted with the players."

Southampton's Ralph Hasenhuttl felt his team missed a big opportunity to progress but wants to quickly turn attention to their Premier League relegation battle.

"I think if you have two times against Derby County a 2-0 lead and you can't win this game in normal time, then you don't deserve to go in the next round," said the Austrian.

"(After Derby's first goal) you could feel that the players were thinking what happened in Derby and you could feel that they are a little bit nervous and not so focused any more.

"We're out; that's a pity. A big chance to come in the next round but we didn't take it.

"If we are not in the FA Cup any more, then we have more time to prepare for the important games in the league.

"That's always the thing you hear from managers, if they step out of the FA Cup.

"In our situation it's very important because it's a luxury problem if you come far in the FA Cup and are relegated."