It's been a scoreless opening 10 minutes but Scarlets have had the better of it so far.

Tom Rogers made a searing break up the right touchline that had Edinburgh scrambling. A crossfield kick was knocked on in the air by James Lang as he looked to prevent it reaching Tomi Lewis and the Edinburgh centre was perhaps a little fortunate that the only punishment was a scrum.

The game has been played almost entirely in the Edinburgh half so far.

"If recent meetings between these two is anything to go by, we should not be short of tries tonight. In fact, their last four clashes have yielded 227 points...."

Ok, whose terrible take was that pre kick-off? Ah, that would be me.

In summary, it's been a scrappy battle in horrible conditions. Cardiff have been awarded three kickable penalties, but only opted to take one. Leinster have not been awarded any kickable penalties, and remain scoreless.

Image source, Getty Images

Andy Burke
BBC Sport Scotland at Hive Stadium

If either of these sides have designs on reaching the playoffs at the end of the season, they really need to get a move on, starting tonight.

Edinburgh currently sit 13th in the table, seven points adrift of the top eight. Scarlets are languishing in 15th, but know a win will take them above tonight’s hosts.

Two teams missing a host of internationals, clearly struggling for confidence and consistency, it could be one of those games where anything happens.

Edinburgh’s record at home is good and you would fancy they would have too much, but let’s see.

I didn't see that coming.

Three minutes before half-time, Leinster coach Leo Cullen opts to make four forward changes - including throwing on RG Snyman.

Either that was pre-planned, or the head coach is distinctly unimpressed with what he's seen so far.

Kick off at the Hive Stadium at the other end of the URC table

Jamie Roberts
Former Wales international on S4C

I'm not sure what Josh Kenny is doing there, he needs to do everything he can to stay in play.

That was too easy for Mason Grady.

If it possible for a man-mountain to be underrated, then Josh McNally surely is. He jackals superbly to thwart a Leinster attack and earn his side penalty.

It's still teeming down out there and the handling errors are racking up for both sides.

As I type Robbie Henshaw and Rieko Ioane combine in midfield but the attack peters out when Leinster wing Joshua Kenny is dragged into touch by Mason Grady.

James Hook
Former Wales fly-half on Radio Wales Sport

The way the conditions are both teams feel better without the ball.

There's a lot of handling errors from both teams, understandably so.

Image source, Huw Evans Picture Agency

Well said Chris.

In fact, matches like this is why so much is made of Leinster's strength in depth compared to most URC sides. They have squad decimated by Six Nations call-ups, but in Robbie Henshaw and Rieko Ioane, a partnership with a combined total of 97 international caps for Ireland, the Lions, and New Zealand.

On the bench, RG Snyman has 50 caps for South Africa while prop Rabah Slimani - well, just the 59 appearances for France.

Chris Kirwan
BBC Sport Wales

Last weekend Wales Under-20s built a lead through the boot of Carwyn Leggatt-Jones when beating Scotland on this ground.

It would be wise to try to do the same whenever kickable opportunities present themselves in these horrendous conditions.

Leinster are without plenty of Ireland stars but Cardiff really could do with taking command because the visitors have the massive figure of RG Snyman on their bench.

Earlier this season at Rodney Parade down the road the South Africa lock came on to change the game and earn victory against a dogged Dragons side.

Cardiff need to be more clinical in the Leinster 22.

Time for my now weekly whinge on teams not taking the points on offer in tight games.

Callum Sheedy kicks to the corner but the Leinster pack repel the drive. A series of carries follow but Dan Thomas knocks-on close to the line and another chance goes begging.

Cardiff coach Scott Andrews speaking to S4C: "Both teams like to play with the ball but unfortunately the weather has started to come in.

"Looking after the ball, especially in these conditions is going to be so important, and hopefully we'll build some pressure on them."

Image source, Huw Evans Picture Agency

Cardiff are still trying to move the ball wide but after the ball goes to ground, a good old fashioned thump downfield from Ben Thomas forces Jimmy O'Brien into a hurried clearance.

It means more attacking possession for Cardiff, before another penalty in front of the posts....

Image source, Huw Evans Picture Agency

James Hook
Former Wales fly-half on Radio Wales Sport

Sheedy's kicking game is looking good already this evening, and of course the first points come from him.

This time, Belcher finds his man and from the pressure that follows, Cardiff have a penalty in front of the posts.

This time, Callum Sheedy calls for the tee and we have our first points of the night.

It's messy out there.

Leinster only have 14 men for now but they are next to threaten as Ruben Moloney makes ground down the left wing before being hauled down by the covering Callum Sheedy.

He tries to fling an ambitious offload but Cardiff gets the ball back - and then Sheedy pulls of a 50-22!

Another attacking line-out then....

James Hook
Former Wales fly-half on Radio Wales Sport

Interesting decision from Cardiff to go for the corner when the three points were kickable.

It has been all Cardiff so far.

There were three points on offer, but Callum Sheedy opts for the corner.

He nails the kick within five metres but then Liam Belcher can't find his man at the line-out. A big chance wasted.

First big moment here.

Charlie Tector, on as early Leinster replacement, is blatantly late with a shoulder barge on Ben Thomas after he chipped forward.

That is 10 minutes for Tector, and a bunker review in the meantime.

Image source, Getty Images

Jamie Roberts
Former Wales international on S4C

Leinster are a perfect example of good training.

They've run through these plays in the week, but it's so tough to execute in these conditions.

It's up to the boys now to call the right moves for these conditions.