Graeme Murty is into his final half as caretaker Rangers manager, while Brendan Rodgers appears to be calling to his Celtic players to keep calm.

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Moussa Dembele gets in on the Rangers goal but his shot is uncharacteristically timid and Wes Foderingham gathers.

Celtic probe through Scott Sinclair, who bamboozles the Rangers defence with his twists and turns before a lovely reverse pass for Stuart Armstrong. The Celtic scorer lashes a shot at goal from the left side of the box, which Wes Foderingham palms away for a corner.

Lovely skill by Kieran Tierney as he feints to cross the ball from out on the left, then nutmegs Rangers' James Tavernier before picking out Callum McGregor as he galloped into the box. The sub cannot control his shot, though.

Clint Hill is booked for a block on Moussa Dembele. I think that's harsh on the big Rangers centre-half - the French striker knocked the ball past him and pretty much ran in to him, but Hill has committed a number of fouls today so presumably Bobby Madden felt he had that coming.

From 25 yards out, Jason Holt shoots at the Celtic goal, but it's at best speculative, and at worst, awful. Still, it's helping to keep Celtic on the back foot for now.

Rangers right-back Lee Hodson appeals for movement as he tries to take a throw-in deep in Celtic territory. Martyn Waghorn gets on the end of the throw and is annoyed that the linesman doesn't award him a corner. However, when Rangers win the ball back he bursts into the box and gives Erik Sviatchenko a few panicky moments in the Celtic defence.

Martyn Waghorn gets Rangers under way for the second half.

Callum McGregor is on for Nir Bitton. 

Rangers had much to be proud of until that goal went in - they had the great chance where Craig Gordon saved Martyn Waghorn's shot and had kept Moussa Dembele out of the match. But the composed strike by Stuart Armstrong looked to have knocked them for six. Time, perhaps, for interim Rangers boss Graeme Murty to deliver a rousing speech in his final half-time team talk.

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Richard Wilson
BBC Scotland at Celtic Park

It has been obvious that Celtic are stronger going down their right side. Celtic don't get enough out of Nir Bitton. He hasn't influenced the game. Kenny Miller has done a lot of good work going back but are Rangers going to get another good opportunity like the Waghorn one? It's hard to see.

Chris McLaughlin
BBC Sport Scotland at Celtic Park

Rangers' fight and passion pegged Celtic back in the first half hour and had Martyn Waghorn converted a glorious chance things might well have been different. When Celtic hit their stride, though, their quality shone and they leave the field at the break with a familiar swagger.

Rod and his family will be happy at the half-time score.

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Danny Wilson chests the ball out for a corner as Moussa Dembele tries to clip the ball around him about 10 yards from goal. However, Bobby Madden calls for half-time.

Scott Brown tries a bit of keepy-uppy out on the left. James Tavernier isn't impressed and his foul on the Celtic skipper results in a booking for the Rangers man.

What a difference a goal makes. Rangers had looked fairly confident until Stuart Armstrong scored the opener but there are signs that nerves are now entering their play. Clint Hill gives his goalie a horrible pass and, under pressure, Wes Foderingham slices his clearance out for a Celtic throw-in. The home fans roar their approval.