Another pinpoint crossfield kick from Finn Russell finds touch deep in the Lyon 22.

Charlie Ewels wins the lineout turnover and Bath are attacking the line again.

But they make a mess of it and Lyon have the scrum.

Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol

It's just what Lyon needed.

It's the first time in the game when their forwards have actually took on the Bath forwards in a tight arm wrestle and won it.

That will be refreshing for them and they'll be thinking we can do it again.

Image source, Rex Features

Bath straight into Lyon territory and the French side have come offside.

Easy decision here and Finn Russell goes for the posts - after running a little time off the clock, of course.

It's bang in front 30 metres out and over it sails.

The lead climbs to three scores.

Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol

Anything can happen in this second half, it's 40 minutes of rugby.

Lyon will be saying if we're going to get into this game then we've got to take our chances and Bath will be saying how are we not miles ahead?

But if Lyon score first in the second half then the game is in a little bit of danger.

Johann van Graan may well have had a few choice words for his players at the break - particularly over their discipline.

The game looked to be there's for the taking, and they're fortunate Lyon could not take advantage of those two yellow cards.

Hollie Davidson gets us under way for the second half.

There's a change of officials on the sidelines after assistant referee Owen Cross is forced off with a calf injury.

Lyon have four more minutes before Bath return to full strength.

Sophie Hurcom
BBC Sport at the Principality Stadium

Image source, Getty Images

After a stuttering, cagey start Bath had seemed to turn the momentum their way with Tom Dunn's try. Max Ojomoh's stylish turn to dot down for their second not long after put their tails up and they were starting to run away.

But two yellow cards in six minutes - one lucky not to have been red - could have cost Bath dearly had it not been for Lyon's lack of ruthlessness in front of the try line.

They saw one try scratched off for a penalty in the build-up and could not take any points despite being within a sniff of Bath's line before the break.

Bath have arguably one of the strongest benches in European rugby at their disposal and with the likes of Guy Pepper, Thomas du Toit, Alfie Barbeary and Ross Molony among those who could come on in the second half, Lyon might be ruing not capitalising when they had the numerical advantage on their side.

Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol

What are Bath doing? Why are they self-destructing like this?

Luckily they are 17-5 up.

They've got this game won really and I know that seems a ridiculous thing to say but really they should be just clawing away the points now.

Lyon look like they are struggling to really get back into this game and the last thing you want to do is to give them chances by going men down and by lack of discipline and giving them penalties.

Bath's coaches will be furious with their discipline because it's undermining what they are trying to do.

Agree folks? Hit the thumbs... thumbs up for red card, thumbs down for yellow...

Lyon head coach Karim Ghezal does not look a happy man as he marches down the tunnel.

And you can understand why. They've not had the rub of the green when it comes to decisions.

Bath really should have lost Sam Underhill for the rest of the game rather than 10 minutes.

But the Premiership leaders won't care. They've not been at their best, but clinical when it mattered.

And 40 minutes away from trophy number two of the season.

Image source, PA Media

Lyon tap and go instead of kicking for the posts, but it comes to nought.

And that's the half.

Lyon pressing, just a few metres out from the line.

Bath are called offside as the French go through the phases.

A second penalty advantage for offside against Charlie Ewels.

That could have been a penalty try and ANOTHER yellow.

It's all a bit scrappy as Lyon force things in search of a response while Bath are reduced in numbers.

Sam Underhill returns after his spell in the bin - he's passed his HIA. Bath back up to 14.

He's greeted by plenty of whistles from the Lyon supporters.

Gareth Chilcott
Ex-England and Bath prop on BBC Radio Bristol

What is going on with Bath!?

There was no need for both of them [yellow cards].

Bath have been the better side. There's no evidence from what I've seen tonight that Lyon will beat them.

Image source, PA Media

Hold on, the TMO is looking at this.

Hollie Davidson calls obstruction at the back of the lineout on Tom Dunn before Ethan Dumortier's break for the line.

And it's chalked off.

More trouble here and Bath are down to 13.

Will Muir chips over the top and takes out the man in the air as he gets his timing all wrong. Easy decision that.