Tom Dunn needs treatment but does not want to go off.

But the Bath bench decide the double try-scorer has done his shift and bring on Niall Annett.

Andy Nicol
Former Scotland and Bath scrum-half on BBC Radio Somerset

Tom Dunn's 51st try is another one-yard try. That was a really powerful line-out drive.

As soon as they got it moving the momentum never stopped. It was as easy a line-out drive try as you are likely to see.

That's clinical, that's what Bath have done for most of this season and that's what they've been lacking so far.

Bath make use of their powerful bench with a triple change.

Miles Reid leaves the field and Alfie Barbeary comes on, Beno Obano is replaced by Thomas du Toit, and Ted Hill comes on for Miles Reid.

Image source, Getty Images

It's 14v14 as the pressure tells and Sam Skinner is sent to the bin.

Bath go for the left corner but somehow the hosts hold on and claim a terrific turnover.

The crowd are well into this.

Andy Nicol
Former Scotland and Bath scrum-half on BBC Radio Somerset

You could see an arm was there and was a factor. The TMO is right in front of it so they must have seen that the ball never touched the ground.

Bath pummel away at the line and after several pick and go's, Bath muscle over the line.

With Ali Price doing his utmost to get an arm under the ball, the decision goes to the TMO. The onfield decision is try.

But after three or four minutes, referee Nika Amashukeli is persuaded to change his mind.

Unbelievable defence.

A dramatic start to the second half as Bath suffer their second sin-binning of the match.

But even with 14, they're right back on the Edinburgh line.

The hosts twice go offside in the red zone and after a third penalty advantage, referee Nika Amashukeli gives them a warning. They've dodged a penalty try and hang on....

Andy Nicol
Former Scotland and Bath scrum-half on BBC Radio Somerset

I think it's the right call - he definitely knocked it down and Darcy Graham would have had a straight run to the corner.

Bath's discipline has again given themselves a difficulty.

Andy Burke
BBC Sport Scotland at Hive Stadium

Sam Underhill just helped himself to a big old portion of Ali Price ribs there.

Huge hit. Fair play to Price getting up from that.

Ooof!

Sam Underhill puts a massive hit on Ali Price as he cleared his lines.

The Edinburgh man is holding his ribs, but it didn't stop him marching his team 60 metres down the pitch.

Bath had much the better of that first half, but Edinburgh were clinical when it counted and are right in this.

They get a huge roar as they follow the visitors out onto the pitch for the second half.

Can the hosts maintain their first-half defensive efforts and derail Bath's treble bid?

Let's find out.

Edinburgh have never won the European Challenge Cup, but have one final appearance in their locker.

They were edged 19-13 by Bath's West Country rivals Gloucester in 2014-15.

Bath have lifted the Challenge Cup once before - back in 2007-08 - and their most recent trip to the final came the last time it was played in Cardiff.

This year's final is in the Welsh capital. Omens?

Andy Nicol
Former Scotland and Bath scrum-half on BBC Radio Somerset

Bath have been the better team but they have not been clinical enough, they've left a couple of chances out there, they've made a couple of mistakes and their discipline has not been great and they've allowed Edinburgh some easy possession and territory and a soft try.

They are clearly the better side but they are only two points ahead.

The first five or 10 minutes of the second half will be vital for Bath because they have got the power and the players to put this game to bed quite quickly but the longer they don't then the more the crowd becomes a factor.

Bath lead by two points after an enthralling first half.

Edinburgh have defended well and carry so much threat on the counter attack.

It's all to play for after the break.

Andy Nicol
Former Scotland and Bath scrum-half on BBC Radio Somerset

I don't think Bath will be overly happy with the performance.

It's not been bad by any stretch but it's not been clinical.

Twice they've scored tries, and they've butchered a couple.

It's just the penalties they'll be unhappy with because they've given Edinburgh easy wins in the game with a try and a couple of soft penalties.

That is a try-saving tackle by Will Muir.

Edinburgh launch another blistering counter attack and Darcy Graham makes a clean break.

The wing makes the pass outside but Muir times his intervention well to take man and ball and stop the move.

Edinburgh reduce the deficit with a straightforward penalty by Ross Thompson.

Bath have had the better of the first half but Edinburgh have been clinical when they have entered the opposition 22 and trail by just a couple of points.

Andy Burke
BBC Sport Scotland at Hive Stadium

Finn Russell just absolutely melted Jamie Ritchie in the tackle.

I suspect that may get mentioned the next time the pair are together in Scotland camp!