The problem for Gloucester here, is they have to play most of the remaining time with 14 men. Saracens, meanwhile, will have George Kruis back in the fold in a few minutes.

And no sooner as Jonny May sat his rear end on the bench, Saracens are back in front.

It's as simple as you like. There is no stopping the driving maul and Mako Vunipola is over to match his brother's try from earlier.

Alex Goode misses the conversion though, so it's still nervous times for the visitors.

It's the fourth yellow card of the night and levels up the numbers.

Saracens instigate a driving maul and Jonny May infringes, so he goes to the bin.

Like Ben Morgan before him, Nick Wood gets a round of applause from the crowd as he has taken off on a stretcher. On the lad's 32nd birthday too, I'm told.

But, we're back underway and, oh, we could have another in the sin bin...

I'm not sure how chilly it is at Kingsholm, but none of the players seem to be doing much to keep warm.

I know they're tough lads, but I'd be tempted to execute a few world-class star jumps to keep the blood flowing.

Nick Wood's treatment gives Saracens time for a bit of a reshuffle.

With George Kruis in the sin-bin, the visitors sacrifice Marcelo Bosch for Maro Itoje to replenish the forwards.

Plenty of players standing around looking concerned.

If you've only just joined us, England number eight Ben Morgan has already been taken off on a stretcher.

And his Gloucester team-mate Nick Wood is about to go the same way. Not great to see two serious injuries in one night.

Once again. Worrying this one. The stretcher is back out and they're strapping Nick Wood to it.

It looked like he took a bit of a stinger in a challenge.

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Callum Braley's try was his first in the Premiership - but will it be enough to give Gloucester a famous victory over Saracens?

With less than 15 minutes to go, let us know where you think this match is heading on Twitter via #bbcrugby

Saracens are made of stern stuff though and turn Gloucester around with a dink through.

They will have a penalty deep in the Gloucester 22. But we have another troubling injury.

Nick Wood has taken a blow and is receiving treatment. Looks to be around the head and neck area.

Where were this Gloucester side in the first hour of the game? They have the devil about them now and are prodding away at the 14 men of Saracens.

Hmmm. George Kruis might be a lucky boy here.

He picks up David Halaifonua and plonks him back down on the ground. Is it a red card? The television match official says no and recommends a yellow card.

The way Halaifonua lands may have helped Kruis out, as he goes down on his shoulder, rather than the neck or head.

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Wow. I thought the Dan Robson try was good.

This was even better.

First, Jonny May breaks from his own five-metre line. It then goes through the hands to Gareth Evans, whose saunters forward and then releases Callum Braley who has all the space in the world to run into. Great try.

Gloucester pummelling Saracens just five metres out and the visitors concede the penalty.

James Hook finds his range again and gets their first points of the half.

Dan Robson is done for the night - he's replaced by Callum Braley. But he gave us the most memorable moment of the game.

Rob Savage is back on too, so both sides have their full XV.

Jonny May shows a rare bit of class in this period. He gets fingertips to a big kick and, just before it looks like it will be knocked on, scoops a hand underneath the ball.

It gives Gloucester territory and another chance to build.

Tom Bradshaw
BBC Sport at Kingsholm

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"Ben Morgan was England's man of the series in the autumn internationals, so his injury is a huge blow for both club and country.

"The bitter pill is slightly sweetened for Stuart Lancaster by the fact that Billy Vunipola (pictured), Morgan's main rival for the England number eight shirt, has scored a try tonight and has been pivotal in the Saracens pack."

Now it's Gloucester messing around. They chuck it about across the back line with a certain lack of poise and, not for the first time tonight, Billy Twelvetrees sees his kick charged down.

The Cherry and Whites just about manage to mop up and win a scrum.

Anyway. Back to the game. Saracens are back up to their full quota as David Strettle comes on, and his side waste a chance to break as Marcelo Bosch messes up his kick.

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The big number eight has now been stretchered off the field. It looks like a pretty bad leg injury, by all accounts. Gareth Evans is on in Ben Morgan's place.