Scotland look completely rattled here.

Chloe Rollie tries to run it out from her own 22, then panics and throws a hospital pass to Lisa Thomson.

The Scotland centre drops it and Canada now have a fantastic opportunity to stretch their advantage in the three and a half minutes before half-time.

Philippa Tuttiett
Former Wales wing on BBC Two

It's reactional play, isn't it? Eating up the space in front of you, throwing in the odd dummy.

You get one, maybe two in behind a defence, it's almost impossible to try and defend.

Lisa Thomson puts the restart out on the full and hands the initiative straight back to Canada.

A really sloppy error.

It's a yellow card for Evie Gallagher, who is deemed to have interfered at the breakdown in the phase where Canada knocked on.

It's a big, big blow for Scotland 10 minutes out from half-time.

Hang on.

The officials are looking at potential foul play by Scotland number eight Evie Gallagher.

This is a massive moment.

Canada pile the pressure on, but knock on when they looked certain to score and Scotland celebrate it like a try of their own.

A monumental defensive effort!

Chloe Rollie jumps out of the line to intercept a flat Canadian pass, but is pinged for offside.

Canada have a penalty just 5m out and kick to the corner.

Andy Burke
BBC Sport Scotland at Sandy Park

Canada are rightly huge favourites, but Scotland have not looked cowed in any way in the opening 26 minutes or so.

The Scottish players spoke this week of the need to be clinical against a defence as stingy as Canada's.

It looked like all that pressure was going to yield little in return, but they showed great patience to engineer that opening for Rhona Lloyd to score.

Helen Nelson has passed her HIA and returns to the fray for Scotland.

A boost for Bryan Easson's side.

Brilliant work from Scotland number eight Evie Gallagher earns a penalty at the breakdown just when Canada were looking threatening.

She's been immense through this tournament so far.

Heather Lockhart
Former Scotland prop on BBC Two

Absolutely loving that try. What a fantastic set of play there by Scotland - the patience, the build-up. Look at that, Rhona Lloyd getting her third World Cup.

Lisa Cockburn is also off for an HIA after that earlier head clash with Helen Nelson.

Molly Poolman is on in her place.

ANOTHER penalty goes Scotland's way and they tap-and-go under the posts...

Referee Aimee Barrett-Theron has a long chat with both front rows and sides with Scotland after the scrum goes to ground again.

The resulting penalty is kicked into the corner. Can Scotland take one of these chances?

Fly-half Helen Nelson accidentally clashed heads with prop Lisa Cockburn in that attack and has to head off for an HIA.

Evie Wills is on in the backs as Scotland prepare to launch another attack on the Canada try-line.