Five quarter-final places filled on last night
Notts, Derbyshire, Birmingham and Leicestershire through in North Group
Glamorgan, Surrey, Hampshire and Somerset progress from South Group
Lancashire v Birmingham 53-2 (7 overs)
Two wickets in the over for Josh Poysden. This is the big one of Liam Livingstone who had made a brilliant start making 39 from just 28 balls with two big sixes.
All eyes on Jos Buttler now with Lancashire needing to win.
Lancashire v Birmingham 51-1 (6.3 overs)
The 50 is up for Lancashire but they've lost their first wicket. It's a bit of a long hop from Josh Poysden but Jordan Clark picks out Jeetan Patel.
It won't get any easier for Birmingham Bears. Out strides Jos Buttler...
Sussex 46-0 (5.1 overs) v Essex
Chris Adams
Former Sussex captain on BBC Sussex
It was absolutely incredible to watch that.
It was the easiest catch. It just landed a yard away from his feet.
In his defence, I don’t know who the fielder is, he’s looking directly into the sun.
Sussex 46-0 (5.1 overs) v Essex
Image source, Rex FeaturesGreat start for Sussex and openers Luke Wright and Chris Nash at Hove.
The Sharks are already ticking over at more than eight-an-over and Nash has been spared by a bizarre drop in the outfield.
Essex fielders struggling with the setting sun on the south coast as well as their line and lengths.
Derbyshire v Worcestershire 20-2 (4 overs)
Worcestershire Rapids are one of just two teams in the North Group who can't qualify for the last eight but it seems they're going to do their best to upset the side's at the top of the table.
Mitchell Santner and George Scrimshaw have a wicket apiece against Derbyshire with Matt Critchley and Luis Reece back in the hutch.
Those wickets have checked the Falcons start. Just the 20 runs from the opening four overs.
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Kent v Surrey 46-1 (4.2 overs)
Breakthrough for Kent after a rapid start at the top of the Surrey order by Jason Roy and Aaron Finch.
Finch is bowled by Adam Milne and then the very next ball, the New Zealand seamer picks up Moises Henriques first ball with a ripper that traps him leg before.
Two in two balls for the Spitfires.
Glamorgan v Middlesex - start delayed by rain
No news as yet of when they'll get going in Cardiff. Rain is still around and the covers are still firmly on.
Both sides will want to get out there for different reasons. Glamorgan can secure a home quarter-final tie while 2008 champions Middlesex will hope to sneak into the top four.
Lancashire v Birmingham 43-0 (4.3 overs)
HUGE. Livingstone clears the stands at Old Trafford. Stand and deliver stuff. He has 31 from 17. What a start!
Lancashire v Birmingham 26-0 (3 over)
Lancashire are off to a flier.
They need to win and Liam Livingstone is doing a fine job at the top of the order. He smashes a huge six into the Old Trafford stands off Olly Stone a ball after crunching the ball for four. The England international has 22 of his side's 26 runs and has a strike rate up over 150.
Hampshire v Somerset 10-1 (2.1 overs)
Image source, Rex FeaturesEngland all-rounder Liam Dawson gets an early breakthrough for Hampshire as they bid to secure a home quarter-final.
Steven Davies falls for Somerset, who themselves could qualify with a win, as wicketkeeper Calvin Dickinson grabs the outside edge from the left-hander.
Leicestershire v Notts 15-1 (2 overs)
Leicestershire have it tough tonight against the North group leaders Notts Outlaws and they've lost their overseas opener.
Luke Ronchi has been dismissed for two by Harry Gurney with Alex Hales taking the catch.
A reminder the Foxes start fifth, level on 15 points with Yorkshire, Derbyshire and Birmingham Bears.
Lancashire v Birmingham 6-0 (1 over)
Perfect start for Lancashire Lightning who need to win tonight as Liam Livingstone guides the first ball for a four down to third man.
The Birmingham Bears line-up is probably the most interesting out of any of these matches tonight.
They have dropped captain Ian Bell for this crucial match with Grant Elliott in charge.
Sussex 5-0 (0.4 overs) v Essex
Under way at Hove in the South Group match between Sussex and Essex.
The winner of that contest could reach the last eight depending on results elsewhere.
Essex have won the toss and elected to bowl first, but Chris Nash has already found the boundary in Mohammed Amir's opening over.
Don't forget we'll have in-game video highlights of this match throughout the evening.
Kent v Surrey 7-0 (0.4 overs)
Aaron Finch and Surrey are not hanging around in their winner-takes-all match at Canterbury.
Surrey won the toss and elected to bat and the Australia international has got himself off the mark with a six off his first ball.
Imran Qayyum the unfortunate bowler..
And we're off...In all but one of tonight's games due to the aforementioned rain at Cardiff.
Here we go then for a roller-coaster ride of possible results!
Every ball of every one of tonight's eight games will be covered for you on BBC local radio this evening.
We'll have in-game video highlights from Sussex v Essex in the South Group alongside regular updates of the match from Hove.
But, with a host of sides still in with a chance of reaching the last eight, you might fancy a bit of match-hopping during the night.
You can do just that by searching through the live coverage options at the top of the page and picking your preferred match.
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Aside from who needs to win and rely on someone else losing, there's another factor that might come into the equation this evening.....
The Great British weather.
Showers are around in various parts of the country and may play a part in delaying the start of a few games.
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The very latest from our BBC reporters in Cardiff is that the covers are still on and rain is still falling.
Fingers crossed conditions change there.
Image source, Getty Images"Now pay attention men!" as Captain Mainwaring used to say in Dad's Army - there's a lot of potential outcomes in the South Group this evening.
We'll be testing your memory later....
Image source, Getty ImagesAs things stand in the North group, Notts Outlaws are the only team to have guaranteed qualification.
Yorkshire, who have played all of their matches, are currently second but that may well change tonight as five teams have a chance to overtake them.