Image source, Getty Images

That's all from us tonight. I'm off for a seriously long lie down.

Keep an eye on the website, where we will have a report from tonight's game and a story on Ben Morgan's injury.

But, for now, I will leave you with the image of Gloucester hero James Hook celebrating with his mates. It might be a fun Friday night in the West Country.

Goodnight folks.

There's still plenty more Premiership rugby to sink your teeth into this weekend.

Tomorrow, Bath v Wasps strikes me as a possible humdinger. Leaders Northampton are at Sale, and Harlequins are hosting a resurgent Leicester side.

And on Sunday it's Newcastle v London Welsh and London Irish v Exeter.

Don't forget, you can listen to all of those games through the BBC Sport website.

Here's how the Premiership table looks then. Despite all that drama, there's very little change. Saracens move a point closer to Bath, and Gloucester draw level with Harlequins.

Gloucester director of rugby David Humphreys told BT Sport: "It was just going from one emotion to the other. We thought we'd lost - we thought we'd lost the bonus point. Then all of a sudden we're coming back for a penalty to us. Huge credit to James Hook."

We should add to David Humphreys' quotes there that BT Sport are saying they have heard Ben Morgan may have suffered a fracture to his lower leg.

Although there is no confirmation of that, and it is only reports at the moment.

As Humphreys says, we won't know for sure until he goes through all the proper checks tonight.

Image source, Getty Images

Gloucester director of rugby David Humphreys told BT Sport about Ben Morgan: "At this stage we haven't any idea. He's off to get a check-up. We'll probably not have a proper idea until tomorrow morning as to the severity of the injury."

Nicely summed up David.

If you've joined us late, you've missed a belter. But don't worry, I'll try to surmise events for you.

Dan Robson's superb solo try in the first half was not enough to have Gloucester in front at half-time, with Saracens' penalty try putting them 13-11 ahead.

It opened up after the break and Billy Vunipola bundled over for Sarries before Callum Braley finished a wonderful Gloucester move that started under their own posts.

Mako Vunipola then looked to have done enough for the visitors, but James Hook's penalty, from miles away, nicked it at the death.

David:, external Support @gloucesterrugby they said, it will be fun they said. More like heart attack inducing #bbcrugby

Tom Bradshaw
BBC Sport at Kingsholm

"If ever there was a night to kick-start a season, this was it.

"Gloucester have been in indifferent form for most of the season - and were indifferent on occasions tonight - but to snatch a last-second victory like that will do wonders for a side whose morale was at very a low ebb only a fortnight ago. Qualification for Europe will now feel like a realistic goal."

How's everyone after that then? At the game? On your sofa? How was it for you?

Tweet us using #bbcrugby

It looked like any hope was dead for Gloucester, and the home crowd, who have been frustrated at times tonight, are lapping it up.

They were a man down in those final moments remember.

Overall, they probably just deserve it. Saracens do get a bonus point, but I don't think it will be much consolation.

Right. Take a breath every one.

Remarkable scenes. Unbelievable.

Saracens thought they had put the nail in Gloucester's coffin with a try, but instead offside is given.

James Hook steps up from 50 metres, puts the penalty between the posts, and the home side win by a point at the death.

Kingsholm goes suitably bonkers.

So instead, James Hook will try and kick from 50 metres...

Saracens turnover and Chris Ashton thinks he is away. Offside.

And there's the chance. James Hook gets some space and puts his boot through it...

It's nowhere near. Oh dear. That could be it.

Again Gloucester build. Maybe searching for a drop goal?

Gloucester hammering away but only hitting cul-de-sacs. Saracens seem to have discovered some discipline.

David Halaifonua makes a go for the line but is held back. Nervous stuff with moments left.

Oh, it's an ugly scrum that sees Petrus du Plessis go in midair and bend over double.

JP Doyle says there was nothing wrong though and resets.

So how much fire is in the Gloucester bellies?

They've got a bit of fortune, that's for sure, as Alex Goode drops the ball likes it's a bar of soap inside his own 22 and concedes a scrum.

Meanwhile, Saracens are back up to 15 players.