Postpublished at 18.2 overs
Middlesex v Surrey 185-5
HUUUUGE!
Jamie Overton hits a full toss back over Jason Behrendorff's head for six.
Five T20 Blast matches
Surrey beat Middlesex by 20 runs
Surrey make it six wins in seven games
Northamptonshire beat Worcestershire; Derbyshire beat Leicestershire in North Group
Hampshire beat Essex & Somerset beat Gloucestershire in South Group
Josef Rindl and Gary Smee
Middlesex v Surrey 185-5
HUUUUGE!
Jamie Overton hits a full toss back over Jason Behrendorff's head for six.
Middlesex v Surrey 179-5
Jason Behrendorff returns for his final over. He's on 1-22.
Kieron Pollard takes a single to put Jamie Overton back on strike.
Middlesex v Surrey 178-5
And again. Jamie Overton pierces extra-cover for a four off the last ball of Tom Helm's over.
So then. 12 balls remain. How many are Surrey making?
Middlesex v Surrey 172-5
And Overton backs up his six with a four next ball.
Surrey are accelerating once more.
Middlesex v Surrey 168-5
Pressure released.
Tom Helm pushes through a short ball but Jamie Overton reads it brilliantly and pulls it away for six.
Middlesex v Surrey 161-5
Excellent from Behrendorff. Only six runs from the over as Surrey begin to stall.
The run-rate has dropped below 10 an over.
Middlesex v Surrey 158-5
Jason Behrendorff starts his third over off with three singles.
In the North Group, Northants Steelbacks are 186-3 after 17 overs against Worcestershire - Chris Lynn unbeaten on 100.
Leicestershire are going along really well at rivals Derbyshire. They're 91-1 after 10.
In the South Group Hampshire Hawks are 75-2 in the 11th over against Essex Eagles. James Vince is the key for the hosts at The Ageas Bowl - he's 35 not out.
Rain is still delaying things between Gloucestershire and Somerset. They've been off for around 45 minutes now.
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
Middlesex v Surrey 155-5
Martin Andersson makes the catch but does not have the ball under control as he hits the deck. His fingers aren't underneath it.
A harsh call I reckon, but not out given. Overton survives.
Middlesex v Surrey 155-5
Mark Church
BBC Radio London
He's back into form, Jason Roy and it has been fascinating watching him.
He's played some gorgeous shots.
He tried to pull that and it came off the bottom edge and it flew back on to his stumps.
Here's the chance in a way for Middlesex to keep this down to something manageable.
Middlesex v Surrey 155-5
Has Martin Andersson taken a stunning caught and bowled to remove Jamie Overton?
The umpires are taking a look at it.
Roy b Andersson 81 (Middlesex v Surrey 154-5)
The BIG wicket.
Jason Roy goes chasing Martin Andersson but this time under-edges the ball on to his stumps.
A fabulous innings comes to a close with his 81 coming off 45 balls.
Jamie Overton is the next batter in.
Middlesex v Surrey 152-4
In T20 game number 596, Kieron Pollard gets up and firing, whacking Toby Roland-Jones for a maximum over deep cover.
Middlesex can't get a break.
Northants 178-2 (15.5 overs) v Worcestershire
Steelbacks opener Chris Lynn reaches his second century of this year's competition off just 48 balls!
It's been another incredible knock from the Australian. Eight fours and eight sixes.
Allow Twitter content?
This article contains content provided by Twitter. We ask for your permission before anything is loaded, as they may be using cookies and other technologies. You may want to read Twitter’s cookie policy, external and privacy policy, external before accepting. To view this content choose ‘accept and continue’.
Middlesex v Surrey 145-4
Beauty from Jason Roy who goes over extra-cover for four and moves on to 80 in the process.
He's on a mission.
Middlesex v Surrey 139-4
Kieron Pollard gets off the mark with a quick single to keep the strike.
Narine c Eskinazi b Green 25 (Middlesex v Surrey 138-4)
Chris Green has the last laugh, squeezing Sunil Narine who digs the ball straight to mid-off.
Former West Indies captain Kieron Pollard walks out to the crease.
Middlesex v Surrey 138-3
Good-looking shots from Sunil Narine who twice chips the ball over leg-slip, reverse-sweeping for four.
He's now on 25 off 15 and going well.
Middlesex v Surrey 128-3
So close!
Jason Roy gets away with one, inside-edging the ball for four.
Inches away from chopping on to his own stumps was Roy, who moves on to 76 off 40.
Middlesex v Surrey 120-3
Wowza from Sunil Narine.
He takes on the fielder on the long-on boundary and dispatches the ball over the top for six.