Spirit post 156-6 thanks to Lawrence's 43 off 26 balls
Spinner Lawrence then takes 4-20 and seamer Wood claims 4-28 as Fire can only reach 139-9
Late hitting from Duckett, Du Plooy and Critchley gets Fire closer than expected after woeful start
Spirit move top of the table, with five wins from six games
Fire have now lost all six of their matches
Thursday's matches: Brave v Rockets women (15:30 BST) & men (19:00)
Miller c Pollard b Lawrence 5 (Fire 37-4)
Game over? (If it wasn't already.)
David Miller tries to hit Dan Lawrence down the ground but doesn't get enough of it and it's straight into the hands of Kieron Pollard.
(Another) very tame dismissal.
Target 157
There's not much for Welsh Fire to cheer about but London Spirit can certainly be very happy with their position.
Top spot looms for them with a win here tonight.
Target 157
A perfectly-timed reverse sweep from Ben Duckett brings a boundary that Welsh Fire were absolutely desperate for.
After his 43 with the bat, Dan Lawrence has just taken two wickets for one run.
One of his sixes was dropped in the crowd and just look at the disappointment on the son's face!
Target 157
David Miller is the new batter.
Talk about having a lot of work to do.
Image source, BBC Sport
Phil Tufnell
Former England spinner on BBC Two
Dan Lawrence weaving a web for the Spirit. Bethell was done for the flight there and sort of yorked himself.
Bethell b Lawrence 10 (Fire 23-3)
The collapse continues. This isn't very good, is it?
Dan Lawrence bowls full, straight and it somehow sneaks under Jacob Bethell's bat and on to the stumps.
Phil Tufnell
Former England spinner on BBC Two
It's just not happening for the Fire is it? They're trying to force it.
Cobb c Bell-Drummond b Lawrence 3 (Fire 22-1)
A very tame dismissal.
Josh Cobb hits Dan Lawrence down the ground but straight to the fielder. It looked almost like he'd just placed that in the fielder's hands, not really going for it.
A very disappointing start.
Image source, BBC Sport
Aatif Nawaz
BBC Two
That ball turning, twisting and somehow finding it's way to the boundary. Like a cat chasing it's tail.
Target 157
A boundary! I really shouldn't be this surprised by a four in The Hundred, but that tells you all you need to know about Fire's innings so far.
Jacob Bethell swipes one into the leg side and the ball trickles away past Jordan Thompson, somehow, because he was pretty much stood right next to it.
Fire will take all they can get right now and that's the end of the powerplay.
Target 157
Josh Cobb, Welsh Fire's captain, is the new batter in to try and save his team.
Image source, BBC SportPhil Tufnell
Former England spinner on BBC Two
Fantastic bit of bowling. That sums up Joe Clarke's tournament really. Thought that four might just get him going.
Issy Wong
Birmingham Phoenix & England bowler on BBC Two
In the end, the pressure just got the better of Joe Clarke.
Clarke c Ellis b Thompson 9 (Fire 13-1)
No. No it wasn't.
Joe Clarke got his boundary, but that was all. He tries to go for another big shot, but slices it straight up in the air for a simple catch for Nathan Ellis.
A pretty horrible start for Clarke and Welsh Fire, that.
A BOUNDARY!
Joe Clarke swats one away for four as Thompson drops short. Is that the momentum boost that Fire were desperate for?
Oh, wow. Joe Clarke takes an ugly swipe at Jordan Thompson's first ball and the ball loops up into the air but away from a fielder.
Looked like a certain catch but Clarke survives. For now...
Phil Tufnell
Former England spinner on BBC Two
They're trying to get on with it, trying to move around the wicket and trying to create the angles but there's just no timing at the minute.
Target 157
Nearly a wicket!
Bethell chips one up in the air that just drops in front of the fielder before Eoin Morgan launches a throw at the stumps that misses by an inch.
It's all a bit frantic. Still no boundaries for the Fire batters.