And that moment comes now.

John Barclay penalised at the breakdown, and this time Johnny Sexton goes for the corner.

The Irish crowd applaud and are on their feet...

Tom Fordyce
Chief sports writer at Stade de France

The predicted deluge has either sidestepped Paris or accelerated through this morning. Dry and warm now in Saint-Denis, as if spring is attempting to finally break winter’s choke hold.

After that miss, Sexton takes over the captain's armband with Rory Best leaving the field.

The Irish number 10 could have some big calls to make in the final period of this game.

Remember, Ireland are five points ahead of England in the table, with the reigning Champions set to play France in Paris later this afternoon.

Rory Lawson
Former Scotland captain on BBC Radio 5 live sports extra

Scotland are still in this fight, they're 13 points behind, but they're still in it, and we've seen in this championship when they get on a roll, they can really score quickly.

Image source, PA

Kit MacInnes-Mamby: I've managed to find a local cafe to watch Ireland v Scotland in the small coastal town of Ilheus, Brazil while waiting for others to arrive at the airport!

Denis Hickie
Former Ireland winger on BBC Radio 5 live sports extra

Ireland just need to settle themselves down now, get past that two-score game, and just go again. That's what they did really well against Wales last time.

And it doesn't pay off.

Ireland could have put two converted tries between themselves and Scotland, but that's an uncharacteristic miss from Sexton.

15 minutes to get a bonus-point score for Ireland.

And that's an interesting call from Ireland.

Johnny Sexton turns down a kick to the corner and will take the three points.

A big moment in this championship?

Ooooooh dear.

The usually ice cool Johnny Sexton misses touch with his penalty but Scotland kick possession away are inviting the green shirts to attack.

And now they've conceded another penalty. "Too many times," says Wayne Barnes. He's not a happy man, the Scottish shirts - in this case back rower David Denton - are not rolling away satisfactorily at the ruck.

It's messy, but Scotland survive the first wave.

Conor Murray fires a flat pass to Garry Ringrose but Fraser Brown gets his hands around the ball and Ireland concede the penalty.

Image source, Reuters

Cian Murtagh
BBC Sport NI at the Aviva Stadium

The sun is now shining on this contest and both teams are producing some thrilling rugby.

Not for the first time in this match, a nervous ripple went around the ground when Ireland turned down a kick at goal but Murray’s try was the reward for their ambition.

Scotland’s attack is still sputtering. Kinghorn’s try was a nicely-worked routine, but Horne and Maitland have both been guilty of rushed passes when a try seemed likely.

This is a big defensive scrum for Scotland right on their own line.

With 20 minutes left to play in Dublin, Ireland are hunting a fourth try and that all-important bonus-point.

England, preparing for their evening match in Paris, will be praying Scotland hold out.

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This is a sustained period of pressure from Ireland and they're difficult to stop from five metres out.

Rob Kearney closes in on the line but that's an important tackle from Huw Jones who fells him by his ankles.

But 18 phases of play is brought to an end though by Wayne Barnes. The ball is "stuck under legs" apparently.

Scotland survive, for the moment.

Daffyd: Scotland have butchered three guilt-edge tries and given a try to Ireland... Ireland have been a lot more accurate and clinical - that is the difference.

Callum: This Scottish back line definitely have money on the Irish... where were you all two weeks ago!?

Dave Sommerville: Better from Scotland but can't help feeling it's too little, too late

It's not only handling errors letting Scotland down this afternoon.

If they are going to to turn the tide, they'll have to get on the right side of Wayne Barnes at the breakdown.

Gregor Townsend's side have conceded six penalties in this match. All six have come at the breakdown.

Image source, Opta

Rory Lawson
Former Scotland captain on BBC Radio 5 live sports extra

These penalties Scotland keep giving away are getting quite crucial, because it gives Ireland a chance to clear their lines and regain territory every time. It must be getting frustrating for Scotland.

Marcus Adams: Can someone pass a message to the Scotland backs coach - ‘Pass it to the bloke next you, we’ll literally win the match...’.

Scotland are making changes in their front row, but it's their backs who need to sharpen up.

Jamie Bhatti and Willem Nel are on in place of Gordon Reid and Simon Berghan.