Yorkshire and Gloucestershire are no strangers to lifting silverware at Lord's, but it has been a few years since either team did so.

The Tykes have won four List A trophies (why do they call anything played over 40, 50, 55 or 60 overs List A?), the most recent in 2002. 

Gloucestershire, meanwhile, were arguably county cricket's pre-eminent one-day side around the turn of the century, with six of their eight victories in Lord's finals coming between 1999 and 2004. 

Batting starMichael Klingeris likely to be a key figure for Gloucestershire in today's contest, but as you can see from the teams Yorkshire must manage without an overseas star in their ranks asGlenn Maxwellis in Australia's one-day squad, andAaron Finchhas now been called up to join him as a replacement for injured David Warner.

Maxwell has been a mainstay with the bat for the White Rose county during their One-Day Cup campaign thus far, scoring 312 runs, including a superlative111 off 76 balls against Worcestershire.So what impact will having neither Maxwell nor Finch available have on Yorkshire's chances?

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Gloucestershire have won the toss and opted to field first. Their team has no major surprises, but Yorkshire have been refused permission by England to include Liam Plunkett and Adil Rashid. It means teenagers Karl Carver and Matthew Fisher will be part of their bowling attack. 

The White Rose do, however, have plenty of England quality in their ranks with Adam Lyth, Gary Ballance, Jonny Bairstow and Tim Bresnan all in the line-up.

Yorkshire:  Lees (capt), Lyth, Leaning, Bairstow, Ballance, Rhodes, Bresnan, Patterson, Pyrah, Carver, Fisher.

Gloucestershire:  Dent, Klinger (capt), Roderick, Marshall, Howell, Jones, Taylor, Fuller, Smith, Payne, Norwell.

According to the band Sweet Billy Pilgrim, "everything's a story, so just let it happen" - and after yesterday's controversy when England's Ben Stokes was given out after Mitchell Starc's throw hit him on the hand during the one-day international against Australia, I wonder what dramas are in store as the plot unfolds at Headingley.

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We'll have the teams and toss for you very shortly, but how did Yorkshire and Gloucestershire make it to the last four?

Gloucestershire won through afteran exciting battle with Hampshireat Bristol, coming out on top by four wickets with six balls remaining in a match reduced to 34 overs each, Australian Michael Klinger top-scoring with 87.

Yorkshire batted first in their quarter-final against Essex, and a score of 252-9 proved good enough as they progressedwith a 20-run victory.

Last weekend, Lancashire lifted the T20 Blast trophy at Edgbaston after victory over Northants. Now, the T20's big brother takes centre stage with four teams still vying for places at Lord's in the One-Day Cup final on 29 September. 

Surrey take on Nottinghamshire at The Oval tomorrow, but today, welcome to our live coverage of the first semi-final between Yorkshire and Gloucestershire at Headingley.