Durham seamer John Hastings sends down three dot balls to Moeen Ali, but the Worcestershire left-hander then gets off the mark with a four through the covers. Only one more run comes from the last two balls though - a tidy start for Durham.

It's a double blow for Notts as Rikki Clarke strikes to remove former Zimbabwe international Brendan Taylor.

Liam Livingstone may have made 350 in a club-match innings earlier this summer, but there was no sign of any fireworks from him at Old Trafford this evening. Having managed only one boundary in 15 balls, he attempts to reverse sweep Wes Durston's off-spin and is bowled.

Not a great start for Gloucestershire in the dark skies of Bristol where the umbrellas are being opened. Chris Dent's night has gone from bad to worse. After dropping Jacques Rudolph earlier, he's out after just seven balls as he's dismissed by Michael Hogan.

BBC Sport's Nabil Hassan in Taunton:

"Still bucketing it down here in Taunton and we've just had a couple of pant-clad streakers who had great fun sliding over the plastic pitch covers. It raised a few cheers but spirits are low here, with the chances of play becoming increasingly unlikely."

Notts batsman Riki Wessels goes from the final ball of the powerplay as he loops one up to Varun Chopra to give Recordo Gordon a wicket in his first over. But it's a useful knock by the opener as he smashed three sixes in making 39 from 19 balls.

Image source, BBC Radio Manchester

Off the field at Old Trafford, BBC Radio Manchester's Liam Bradford has been talking cricket with the legendary Farokh Engineer, who played 46 Tests for India and also played at county level for Lancashire.

Karl Brown - playing his 50th T20 game for Lancashire, as we said earlier - goes for a big swipe, but Chesney Hughes takes a good catch inches inside the boundary at long-on. An important breakthrough for the Falcons with Liam Livingstone yet to find his touch at the other end. "We've lost two wickets, but that's no trainwreck seven overs in," says Lancashire batsman Paul Horton, who is not playing this evening.

Image source, Getty Images/BBC Sport

The covers are still on at Taunton, where we're waiting for the start of play between Somerset and Surrey and Chris Gayle's final farewell.

When Gayle signed, Somerset supporters would have accepted a batting average of 328 and a strike rate of 192.94 from their star arrival.

At the start of play this evening, only Kent's Sam Northeast (344) has scored more T20 Blast runs in 2015 - and he's had three more innings than Gayle.

A great end to the innings for Glamorgan as Jacques Rudolph finishes unbeaten on 101. The South African hits his first century in T20 cricket, including 13 fours, leaving Gloucestershire chasing 192 for victory in Bristol.

Ashwell Prince is dropped at square leg by Billy Godleman, but does not make Derbyshire pay for the error as Wayne White traps the South African left-hander lbw with the final ball of the same over.

Image source, Getty Images

Lancashire debutant Saqib Mahmood is aged 18 years 107 days and has played Test and one-day cricket for the England Under-19 team. He was born in Birmingham, but grew up in Rochdale, and was awarded his first professional contract by Lancashire ahead of the 2015 season.

Named England Development Programme Cricketer of the Year last month (see photo), he gets his chance this evening because George Edwards has been ruled out for up to eight weeks with a side strain.

Northants Cricket on Twitter, external: "The rain has stopped at Leicestershire... Umpires to have a look at 7. #LetsGoSteelbacks"

Worcestershire have won the toss at Chester-le-Street and have chosen to bat first.

Mark Stoneman replaces Graham Clark for North Group leaders Durham, while visitors Worcestershire are unchanged from the side that lost their last fixture to Nottinghamshire.

Durham Jets: Stoneman (capt), Mustard, Macleod, Collingwood, Arshad, Muchall, Pringle, Hastings, Jennings, Rushworth, Borthwick.

Worcestershire Rapids: Mitchell (capt), Ali, Oliver, Munro, Kohler-Cadmore, Whitely, Cox, Barnard, Leach, Ajmal, Shantry, D'Oliveira.

Notts lose their first wicket as Steven Mullaney, promoted to open in the absence of England's Alex Hales, tries to go big but slices to Will Porterfield off Oliver Hannon-Dalby.

Essex have won the toss and will bowl first in their South Group match with Sussex at Hove.

Essex make one change from the team that beat Gloucestershire last night, welcoming back left-arm seamer Reece Topley, while Sussex's powerful batting line-up contains captain Luke Wright and Sri Lanka international Mahela Jayawardene.

Sussex: Wright (capt), Nash, Jayawardene, Cachopa, Machan, Brown, Beer, Yardy, Mills, Robinson, Liddle.

Essex: Ryder, Westley, Bopara, Pettini, ten Doeschate (capt), Foster, Napier, Browne, Masters, Tait, Topley.

And it's an incredible catch in Bristol as David Payne shows his reflexes to dismiss Chris Cooke. Eight balls to go.

At The Oval, England have lost three quick wickets and are now in a period of recovery at 151-3, chasing 399 to beat New Zealand.

Into the final three overs in Bristol. Can Jacques Rudolph reach his century? The Glamorgan captain needs another 17 runs with 18 balls of the innings remaining.

Birmingham Bears have won the toss and will field first against Notts at Edgbaston.

Ian Bell will open for the Bears after his match-winning knock at Durham last weekend, while James Taylor captains Notts after being overlooked by England.

Birmingham Bears: Chopra, Bell, Porterfield, Evans, Clarke, Ambrose, Javid, Patel, Gordon, Poysden, Hannon-Dalby.

Nottinghamshire Outlaws: Mullaney, Wessels, B. Taylor, Patel, J. Taylor, Sammy, Smith, Wood, Ball, Fletcher, Hilfenhaus.