Cooke smashes his first delivery over cover for four, but can't connect with the next, and things are looking good for Essex, whose own game against Kent had to be abandoned because of rain. The penultimate delivery brings two to long-on and Cooke can do no better from the last, leaving Gloucestershire to score 46 for victory and dash Glamorgan's hopes of a place in the last eight.

BBC Radio Wales

Glamorgan all-rounder Gareth Rees: "It's been a disastrous decision to change the batting order.

You're going to have Chris Cooke, Mark Wallace and Jacques Rudolph hardly facing a ball between them. Very disappointing. I feel sorry for Graham Wagg in this position as he's hardly ever faced the new ball in a one-day game."

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Craig Miles is one of the most promising young pace bowlers in county cricket and after beating Graham Wagg with his opening delivery, cracks him on the helmet with his second.

Medical staff are immediately out in the middle to check on his condition. Wagg is able to walk back to the pavilion as Chris Cooke comes out to replace him, with four balls left in the innings.

Graham Wagg connects with thin air as he attempts to smash Benny Howell's opening delivery into the stands.

Last month the all-rounder hit 11 sixes in making 200 off 216 in a Championship game against Surrey, but his eye is well and truly out in this game as he adds just a single from the next four balls. Only one from the over as Meschede flails and misses at the last one. Glamorgan badly need a good final over.

BBC Radio Wales

Commentator Edward Bevan: "Graham Wagg has missed out on eight or nine balls here, which is concerning. It's getting a little bit disastrous here."

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Although all eyes are firmly fixed upon events in Cardiff, we did actually get a full game in at Headingley tonight - and Yorkshire have just beaten Birmingham Bears by eight wickets.

With the Bears already through to the next round and the Tykes without any hope of reaching the last eight, the hosts turned the form book upside down to successfully chase 146 for victory.

Batsmen Alex Lees (63) and Jack Leaning (60 not out) did the notable damage.

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Graham Wagg finally gets bat solidly on ball as he mows Noema-Barnett away to the leg-side boundary before taking a single to deep extra cover, bringing new batsman Craig Meschede onto strike. An outside edge brings Meschede four runs, but he can only muster two from the final delivery as he mis-times the ball down to long-on.

BBC Radio Wales

Glamorgan all-rounder Gareth Rees: "Craig Meschede coming out at number three, but I'm very surprised with this batting order and holding back Chris Cooke who has the ability to clear the ropes regularly. Mark Wallace has also got experience of opening in T20 cricket."

Kieran Noema-Barnett's name is a text commentators's nightmare, but he is next up for Gloucestershire and starts in disappointing fashion with two wides in his first three deliveries. Ingram then lofts a catch to Chris Dent in the deep and departs for 18

James Fuller takes over bowling duties for Gloucestershire and immediately concedes four leg-byes, but beats Graham Wagg with his next four deliveries, dot balls Glamorgan can ill afford in a five-overs game. Wagg manages to get the bat to the final one but it goes nowhere and Fuller takes his team-mates' plaudits for a maiden.

BBC Radio Wales

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BBC Radio Wales presenter Rick O'Shea: "Credit to the boys and everyone involved here at the ground to get us in a position to get the game on.

"There's a significant number of people who've come to the ground here tonight.

"But, the rain does feel heavier than it did earlier in the evening when I last went out on the outfield."

BBC Radio Wales

Glamorgan all-rounder Gareth Rees: "There's probably less than 1,000 people in here, but they're making a great noise and now there's a great chance to qualify for the quarter-finals."

So what's a decent score in a five overs game? David Payne beats Colin Ingram with his opening delivery in the first of two powerplay overs, but the South African responds by hoisting the next one for six before drilling a four through the covers. A mis-field on the square-leg boundary gives Ingram another boundary and Payne then commits the cardinal sin of giving the Welsh county an extra delivery by sending down a wide.

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Glamorgan chief executive Hugh Morris on BBC Radio Wales: "Over a season of 14 games we've played really well in patches and not so well in others, but at least we've given ourselves a chance of getting through and now we've got to try and take it."

Gloucestershire have won the toss and asked Glamorgan to bat first in this T5 Blast thrash...

Glamorgan: Rudolph (capt), Wallace, Ingram, Cooke, Wright, Donald, Meschede, Wagg, Lloyd, Cosker, Hogan.

Gloucestershire: Dent, Klinger (capt), Jones, Noema-Barnett, Howell, Hammond, Payne, Taylor, Smith, Miles, Fuller.

It would be tough on Essex if they lose their place in the last eight after waiting as long as possible before having to call off their own game against Kent at Chelmsford. But don't expect Welsh cricket fans to shed any tears if their team succeeds in reaching the knockout phase of the competition for the first time since 2008.

So here we are then....after the abandonment of six of the final round games because of rain, and events at Headingley between Yorkshire and Birmingham Bears having no bearing on the T20 Blast quarter-finals, we have a little late evening excitement for you.

Thanks to the efforts of the groundstaff at Cardiff's Swalec Stadium, we are going to have a five overs-a-side game between Glamorgan and Gloucestershire. The equation is simple - if Glamorgan win, they go through as one of the four qualifiers from South Group. If they don't, Essex will claim the final place.