Postpublished at 16:37 British Summer Time 8 June 2014
Every player bar Spain keeper Luis Miguel Arconada is in the Northern Ireland half. There are 35 minutes for the visitors to hold on.
FT: Spain 0-1 Northern Ireland
NI qualify for second round
Armstrong scores in 47th minute
Donaghy sent off for NI
Emlyn Begley
Every player bar Spain keeper Luis Miguel Arconada is in the Northern Ireland half. There are 35 minutes for the visitors to hold on.
Jonny:, external What a run by Gerry Armstrong and a great cross from big Billy. Hope we can hold on for the win!
Gerry Armstrong
Former Northern Ireland striker
"Pat Jennings for about four or five years was probably the best goalkeeper in the world.
"Gianluigi Buffon is the record world transfer for a goalkeeper at £37m. I don't think Buffon is actually as good a goalkeeper as Jennings.
"He gave us so much assurance because even when they got through the defence we knew they still had Pat to beat and that wasn't too often."
John Motson
BBC commentator at Estadio Luis Casanova
"Pat Jennings is so good at point blank range - we have seen that so many times in his career. The angle didn't wholly favour the attacker, and Jennings knew exactly where to be to narrow the angle even further and make the stop.
"The whistles now are for Spain who are up against it in a way that wasn't expected in this first round group. One was beginning to think there wouldn't be any shocks among the second round qualifiers but can Northern Ireland be the surprise package as they were in 1958. They are playing for each other tonight in a way they haven't quite managed before."
Roberto Lopez Ufarte has a great chance to equalise from 16 yards out but his low shot is saved by legendary Northern Ireland keeper Pat Jennings.
Huge moment in Valencia.
Gerry Armstrong
Former Northern Ireland striker
"I knew once we scored that was it because we were so tough to break down.
"We were really comfortable - they had Satrustegui and Quini as their two front men. They were putting crosses in and I just thought they were never going to score."
Can you believe what you've seen at the Luis Casanova? As things stand Northern Ireland win the group and Spain go through as runners-up.
Curtinio:, external Arconada... ARMSTRONG!!!!
Northern Ireland bring on Tommy Cassidy of Burnley for Stoke City midfielder Sammy McIlroy, who was booked in the first half.
Gerry Armstrong
Former Northern Ireland striker
"It came from one of the few opportunities we created. It was just after half-time and I was playing slightly in front of Jimmy Nicholl, he was playing at right-back and I played about 10 yards in front of him to give him protection.
"Lopez was a dangerous, quick left winger and he had to get past me before he got to Jimmy Nicholl. Gordillo was the left-back, he had his socks round his ankles and he used to push forward all the time.
"I sort of half anticipated his pass and intercepted it just outside our own box. I remember running with the ball for about 30 or 40 yards and Xabi Alonso's father, Miguel Alonso, tried to kick me to stop me but I kept going and I put it out wide right to Billy Hamilton.
"Billy did fantastically well down the right side, he got past Tendillo and put in a fantastic cross which tempted the keeper, Arconada, to come for it and once he came out and made the mistake the ball came in my direction.
"I thought 'keep it low and hit it hard' and that's what I did. Fortunately it went through Arconada's legs and into the back of the net and we took the lead against all the odds and what everyone else believed."
John Motson
BBC commentator at Estadio Luis Casanova
"A mistake by Luis Arconada - he is not the best goalkeeper in Europe on that form. Gerry Armstrong drives it through him and through the defenders legs for the 100th goal of this World Cup and what could be a priceless one for Northern Ireland.
"Armstrong has scored both their goals in Spain and their crucial goals in qualifying and he was on hand again, after starting the move in his own half. If it stays like this Northern Ireland would qualify and so would Spain, with Yugoslavia going out."
Can you believe it?! Gerry Armstrong gives Northern Ireland a remarkable lead. The Watford player breaks a Spain attack up, charges forward and plays the ball out right to Billy Hamilton.
Hamilton runs down the wing and his cross is only parried by keeper Luis Miguel Arconada. Armstrong is there to fire past him for a famous, famous goal.
The ball is spending most of the time in the air in the opening minute of the second half.
Peter:, external Spain 0-0 N Ireland. The home crowd are growing restless, the Spanish players reckless, our players are tiring, dare we dream...
Northern Ireland kick off the second half. Spain have made a change, Quini comes on for Jesus Satrustegui up front.
Charlie:, external Wouldn't it be great to one day see Spain playing beautiful football rather than this? Shan't think it too likely, mind...
Apart from the Falklands War and the World Cup, what else is going on in I hear you ask?
Well, the first total rail strike since 1955 is taking place.
Bad news of you living in London too - the Underground is also striking meaning the two transport systems are striking simultaneously for the first time since 1926.
Across the UK, unemployment has increased by one person every minute since Thatcher's government took over in 1979, a Labour MP says.
Northern Ireland have a big name on the bench in Tommy Finney.
Not the former Distillery (and Preston) winger though - it's Cambridge United's 29-year-old midfielder.
Will we see him at some stage?
Steve, Coleraine: We haven't really tested this keeper Arconada yet and I personally think he looks a bit nervous. A few more inviting crosses into the box and he might flap at one and give us something...
Of course this game is not the talk of the world. In the United States a lot of water cooler chat has been about Steven Spielberg's new film 'ET', which came out over there a couple of weeks ago. It's about an alien apparently.
Sadly it's not hitting British and Irish cinema screens until December but by all accounts it'll be worth a watch.