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It's business time in the World Cup qualifying campaign.
England secured their place in Russia last night with their late, late winner in the bore-fest against Slovenia, but will any of the other home nations and the Republic of Ireland join them?
Scotland , Wales, Northern Ireland and the Republic of Ireland all remain in the qualification mix, but just what do they need to do to book their places?
I'll be honest, it's complicated.
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There are more permutations than there were paper planes at Wembley last night, but we've used all of our fingers and toes to try and work out exactly who needs to do what in order to ensure they don't have next summer off...
Scotland
(Image: Action Images via Reuters)
Any hope of Scotland landing automatic qualification ended a while ago, but last night's win over Slovakia keeps them in the hunt for a play-off place.
Remember: The top eight second-placed finishers will qualify for the play-offs, with the ninth missing out. Results against the bottom-placed side are wiped out.
So, first up, Scotland must beat Slovenia on Sunday.
They then need Sweden, Bosnia-Herzegovina or Wales (all currently in second place) to drop points and that would ensure a play-off spot.
Sweden play Luxembourg and the Netherland, Bosnia take on Belgium and Estonia, while Gareth Bale-less Wales face Georgia and the Republic of Ireland, so there is a good chance at least one of those three will drop points.
Holland, Greece and the Republic of Ireland can all overtake these three sides into second place, but none of them will be able to better Scotland's point tally.
Northern Ireland
(Image: Alexander Hassenstein)
After losing to Germany last night, Michael O'Neill's team cannot qualify as group winners. They have secured second place in the group and look good to land a play-off spot. A positive result against Norway on Sunday will seal the deal.
Wales
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Chris Coleman's men could secure second place on Friday if they beat Georgia and the Republic of Ireland suffer an unlikely home defeat to Moldova.
Should they win tonight and against Republic of Ireland then they will be almost guaranteed a play-off spot.
The only fear is that they miss out on the play-off spot if they are the ninth-best finisher.
Top spot is not beyond them, but will be if Serbia win either of their two remaining matches.
Republic of Ireland
(Image: REUTERS)
Martin O'Neill's men can still theoretically win Group D, but will need to win their last two games and hope Serbia lose their remaining fixtures.
They currently trail second-placed Wales by a point, so a loss to Moldova and a Wales win will see them eliminated.
With the Republic of Ireland going to Cardiff on Monday night we could see a winner-takes-all clash for the ages.