It was a great effort from Will Muir, but it was a try and the TMO confirms it.

The conversion is missed, but a fantastic opening from the French side.

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

Lyon deserved that.

They actually took it down and drove and Bath were caught napping.

They got about five or six yards, got momentum and they let the ball out just before they lost that momentum which meant that Bath were always struggling to get into defensive positions.

Image source, PA Media

It's also a big occasion for Hollie Davidson.

The Scot becomes the first woman to referee a European rugby union final this evening and she gets us under way.

Will Bath go one step closer to the treble?

Or will Lyon spoil the party?

You're welcome to stay with us right here until full-time, but we have other options should you fancy it.

There will be live commentary of this evening's final on BBC Radio 5 Live and BBC Radio Bristol.

Just click on the link at the top of this page from 20:00 BST.

Sophie Hurcom
BBC Sport at the Principality Stadium

Bath head of rugby Johann van Graan has been cutting a fairly solitary figure walking around the pitch mostly on his own with his hands behind his back as the coaches and players run through their warm-up before kick-off.

In fact, the South African has had his back to the Bath side of the field for much of the time, and has been drilled into focus on the Lyon players, perhaps looking for any last-minute intel on what they're soon to be up against.

It's hard to overstate just how much Van Graan has transformed Bath's fortunes during his almost three-year tenure so far.

Victory tonight would end a 17-year wait for a European trophy and mark the start of a potentially massive three weeks ahead, with the crown jewel of a first Premiership title since 1996 up for grabs after another dominant league campaign.

Van Graan's mantra all season has been "never too high, never too low" and while Bath will have been revelling in being in a final in Cardiff the past day, he will have been keeping his players' focus very much on the matter at hand of the next over 80 minutes, not the occasion.

Despite Lyon’s lowly domestic league position, Bath director of rugby Johann van Graan is not taking his opponents lightly.

Yet it doesn't sound as though he’s suffered any sleepless nights over the Top 14 outfit.

Instead the South African is more interested in harnessing what his side are capable of.

“Good maul - specifically their five-man maul - good scrum, they’ve got some fantastic broken-field runners,” he said of the French side.

“[We] respect them for who they are, but focus totally on ourselves.

“As a group, we needed to get to know them a bit more, but it’s been 90% focused on ourselves, and what do we need to do and how do we improve, and 10% on Lyon.”

Image source, Getty Images

Bath continued to look the real deal last weekend as they brushed aside their closest Premiership rivals, Leicester, in emphatic style - 43-15.

But van Graan is in no mood to let complacency sneak in among his players - he wants even more tonight.

“Keep it simple, stick to your process, keep doing the things that got you in the final,” he said.

“Credit to the players, this week has all been about what we did learn about Leicester, what can we do better this week and how do we adapt the plan for what’s coming on Friday night.”

He added: “What life teaches me is if you stand still, somebody else is moving forward, so we’ve got to keep moving forward,” said the director of rugby.

“We want to get better, we’ve improved in every single area, so we’re not about to stop now.”

And here's Olly Barkley's memories of that landmark day 17 years ago when Bath last lifted the European Challenge Cup.

Our colleagues at BBC Sounds in Bristol have been looking back on how Bath has reached the final for the first time since 2008.

While Bath's current crop of stars are readying themselves for a first European final together, the club is no stranger to the biggest stages.

This will be their fifth appearance in the Challenge Cup final, having won the title in 2008 and finished runners-up in 2003, 2007 and 2014.

And prior to that, Bath feasted at the very top of the European game, winning the third edition of the Champions Cup back in 1997-98 season, edging Brive 19-18 in the final.

Image source, Getty Images

Bath are fielding virtually the same side that dismantled the Tigers 43-15 in the Premiership last time out.

In the pack, Miles Reid comes in at number eight as Alfie Barbeary drops to the bench, while British and Irish Lions tourist Will Stuart is picked ahead of Springboks star Thomas du Toit.

Among the backs, Max Ojomoh returns to outside centre for Cameron Redpath who injured his ankle against the Tigers, and Tom de Glanville starts at full-back, replacing the benched Ciaran Donoghue.

For Lyon, former Northampton Saints pair Sam Matavesi and Semi Radradra drop out among a number of changes.

Bath: De Glanville; Cokanasiga, Ojomoh, Butt, Muir; Russell, Spencer (c); Obano, Dunn, Stuart; Roux, Ewels, Hill, Underhill, Reid.

Replacements: Annett, van Wyk, du Toit, Molony, Pepper, Carr-Smith, Donoghue, Barbeary.

Lyon: Niniashvili; Rattez, Maraku, Millet, Dumortier; Berdeu, Couilloud (c); Rey, Chat, Ainsley; William, Guillard, Cretin, Saginadze, Botha.

Replacements: Marchand, Kaabeche, Aptsiauri, Lambey, Allen, Gouzou, Page-Relo, Meliande.

Image source, Ge

French Top 14 side Lyon have not had their best at home this season, but are 80 minutes away from a second Challenge Cup in four seasons.

Lyon currently sit 11th in their domestic league after three successive defeats, including a narrow 31-30 reverse to Stade Francais last weekend.

But in Europe they have dispatched Challenge Cup holders Sharks, Welsh side Ospreys and Owen Farrell’s Racing 92 in their run to the final.

And watch out for fly-half playmaker Leo Berdeu.

Image source, Getty Images

Bath’s only big setbacks this season have come in Europe’s premier competition - the Champions Cup.

They were knocked out in the pool stages and dropped into the second-tier competition after just one win from four.

But they have used the setback as a springboard.

After thrashing Pau in the last 16, Bath brushed aside neighbours Gloucester in the quarter-finals and then saw off Edinburgh on the road in the last four.

Image source, Rex Features

Johann Van Graan has worked wonders since taking over the West Country side just three years ago.

From basement side back then, the Blue, Black and Whites are now just a handful of games from an historic treble.

Victory tonight would bring a second knockout success of the season for Bath who broke their 29-year domestic trophy drought by lifting the Premiership Rugby Cup in March.

And who would bet against them in the league?

Van Graan’s side have already guaranteed the Premiership top spot with three games to spare and with it a home semi-final in the play-offs.

“What life teaches me is if you stand still, somebody else is moving forward, so we’ve got to keep moving forward,” said the director of rugby.

“We want to get better, we’ve improved in every single area, so we’re not about to stop now.”

Good evening and welcome to a mouthwatering night of rugby from the Principality Stadium in Cardiff.

Having ended their 29-year wait for a domestic trophy in March, Bath are now gunning for a first European honour since 2008.

Standing in their way of lifting the European Challenge Cup for a second time is 2021-22 winners, Lyon.

We’re just half-an-hour away from kick-off so to wile away the time, let’s find out a little more about our finalists.