BBC Radio Manchester's Nathan Middleton suggests the two sets of players haven't really come out at the start of the second half - and looking at the picture below who'd blame them?

Ten minutes into the second period and only a fifth Danny Cipriani penalty to tell you about.

Image source, Rex Features

Image source, Rex Features

Quick ball from Quins after a concerted spell of pressure and a great tip-on from Mike Brown gets Charlie Walker in at the right corner for their third score of the afternoon.

The former sprinter showed great feet to outstrip James Short in a narrow channel.

No surprise the source of Exeter's further points. Gareth Steenson once again clips the ball through off the tee to stop Quins from slipping too far clear on the scoreboard.

Worcester concede a penalty as Niall Annett comes in at the side, and Charlie Hodgson gets a chance to kick for goal.

It was in a decent position, but he sends his kick wide.

Sarries captain Alistair Hargreaves is not returning after that early knock to the head, so Maro Itoje stays on.

Adam Williams
BBC Sport at Twickenham

Image source, Getty Images

Certainly quite sedate around Twickenham in the early stages of this one.

The top tier and more than half of the middle tier of seating are unsold for this London Double Header.

Not quite the balmy late summer afternoon which usually greets this occasion.

The PA announcer is doing his best to crank up the atmosphere though with a rendition of Sweet Caroline.   

Mike Delany has kicked us back under way at a rainy AJ Bell Stadium.

Both sides having a few issues at the scrum, referee Matt Carley has spent a fair bit of time speaking to the two front-rows.

Exeter have another penalty close to the line, after intense pressure, and Gareth Steenson makes no mistake once again.

Worcester have dominated possession in the opening quarter hour despite Saracens's early score.

They get another penalty from close range and opt to go for the line-out.

Donncha O'Callaghan tries to force his way over the line but eventually Sarries force the knock-on and win a scrum about eight metres out.

Worcester come close to answering with a try of their own after going through the phases from an attacking line-out.

However referee Ian Tempest was playing advantage and Tom Heathcote gets a kick at the sticks.

However, he shanks it wide and Warriors miss a chance to reduce the arrears.

Phew... all going on at Sandy Park.

Quins got a try when scrum pressure eventually told and they were awarded the penalty try after Chiefs again melted at the set-piece.

Moray Low in response won Chiefs a penalty in front of the sticks that was dispatched calmly by Steenson to reduce the arrears.

However, minutes Danny Care popped a glorious grubber through for Nick Evans to chase and the Kiwi pounced to score.

Conversion missed. Game on.

An early worry for Saracens, with captain Alistair Hargreaves involved in a clash of heads with Warriors prop Nick Schonert.

Hargreaves is off for a head injury assessment. Youngster Maro Itoje replaces him.

A couple more Danny Cipriani penalties - taking his tally to four from four - has Sale Sharks 12-8 ahead at half-time, despite Rob Vickers' try for Newcastle Falcons.

So we are under way at Twickenham in the first game of today's London double header.

Warriors fly-half Tom Heathcote gets us started.

The two teams are out at Rugby HQ, passing through a tunnel of mascots with flags.

Worcester come first, led out by TJ van Velze, followed by Premiership champions Saracens.

Ernst Joubert leads Sarries out - a nice touch in his final professional game.

The top tier of Twickenham may be closed today, but there is a healthy crowd for the first match of today's London Double Header.

Worcester Warriors make 14 changes for their trip to Twickenham in the wake of last week's European Challenge Cup defeat by Zebre.

Only Sam Betty keeps his place for Warriors in their first-ever Premiership appearance at the national stadium.

Prop Na'ama Leleimalefaga returns along with skipper GJ van Velze, while South Africa international Wynand Olivier comes back in at centre.

Image source, BBC Sport

Replacements: Bregvadze, Rapava Ruskin, Rees, Cavubati, Cox, Mulchrone, Lamb, Howard.  

Gareth Steenson penalty has Exeter ahead but they had to be at their best to hold up Harlequins over the line after a string of bludgeoning pick-and-gos.

Quins have the home side on the rack at the scrum on a rather windy afternoon, penalties going against the Chiefs.

South African number eight Ernst Joubert will make his final appearance for Saracens before retiring.

Sarries make nine other changes to the side which won at Ulster in the European Challenge Cup last weekend.

Skipper Alistair Hargreaves returns at lock while Charlie Hodgson partners Ben Spencer in the half-backs.

Sarries are forced into a late change after Will Fraser is ruled out with a minor knock. Jackson Wray comes into the side and Kelly Brown switches to openside flanker.

Image source, BBC Sport

Replacements: Saunders, Barrington, Lamositele, Itoje, Vunisa, de Kock, Farrell, Tompkins.