Saracens snuffle out the danger though. Now Stephen Myler kicks long and Billy Vunipola, chasing the ball back to safety, almost comically tumbles over. He's out of gas, and comes off for Jamie George. Five minutes left.

Alex Goode and Stephen Myler exchange a couple of kicks in midfield, before Charlie Hodgson boots into touch on the full. Northampton have a line-out in a decent position.

Brian Moore
Former Harlequins and England hooker on BBC Radio 5 live

"Northampton must not panic now. They just need to keep playing, don't force things and then make mistakes. There's plenty of time left."

It's good from Hodgson and now Sarries hold all the cards.

Billy Vunipola wriggles half-clear for Saracens but Northampton get back to him. Charlie Hodgson has a shot at goal though, after Saints are penalised for a deliberate knock-down...

There are some tired old bodies out there now - this really has been a gruelling encounter. I'm shattered just watching it. Charlie Hodgson gets us underway for the final time in this match.

Danny Owen:, external At daughter's dance festival, glued to the updates. Wish I was watching the game... no, really!

Chris Jones
BBC Radio 5 live commentator

"There are bodies everywhere on the floor... cramp, tiredness. It's been an enthralling final."

And there goes the whistle. The two sides are still level but, with Northampton having scored two tries to Saracens' one, Saints will be very slight favourites going into the final 10 minutes.

Alex Goode gathers a long kick forward and counter-attacks for Saracens. He's had a really solid game this afternoon, the England full-back. We're ticking towards the end of the opening period of extra-time.

Gareth in Watford via text: "Extra-time is literally the worst-case scenario for Stuart Lancaster. All his England players are going to be mentally and emotionally shattered by the time they get on the plane to NZ. He has already possibly lost his first-choice fly-half Owen Farrell to a ridiculous self-induced injury too. Now there is further risk of more players getting injured. Still- great match though!"

Saracens on the attack now and have found a way through, only for Jackson Wray to be held up just short of the line. JP Doyle heads to the TMO, however, and as it happens Sarries have been penalised for an earlier infringement so it wouldn't have counted anyway.

Hodgson lands the kick and we're all square again. To remind you, he came on for Owen Farrell after the England fly-half injured himself celebrating a try that didn't even count. Really!

Here's a scrum then, and it'll be a penalty for Saracens, who've had the edge at scrum-time throughout this final. Chance for Charlie Hodgson this time...

Daniel Martin:, external Once again over enthusiastically addicted to the updates and now extra-time?! I don't think I can take it...

Andrew Priestley:, external What a final! Amazing to think that after a season of rugby it still has to come down to extra-time.

James Tonkinson:, external Who's got more bottle - Myler or Hodgson?

It's good from Myler, and Saints lead by three!

First chance in extra-time goes Northampton's way, after Saracens fail to release at the breakdown. This is within Stephen Myler's range, I'd say...

Stephen Myler gets us underway again, and Alex Goode returns into touch. The Twickenham crowd sure are getting their money's worth today.

BBC Sport's Nabil Hassan at Twickenham: "A lick of paint was the difference between victory for Saracens and defeat for Northampton but in the end there is nothing to choose between these teams as the game heads into extra-time for the first time in Premiership history. A fitting way to end what has been a quite brilliant season."

Well, this is all a bit new! So, we now have 20 minutes of extra-time, 10 minutes per half. If the scores are level after all of that, the team with the most tries in the match will win. Currently, that's Northampton. You still with me? Good, let's do this...