There's a break after this end and we've reached the business, erm end of the, erm, end.

Two stones each left. More Swiss red than British yellow in the house...

If you know the answer to Robin's question, do share it with us.

Robin Soanes: In curling, why does the person delivering the stone do so whilst carrying their broom? Surely it would be easier without it, especially when the sweeping is done by their team-mates...

Caroline Chapman
BBC Sport in Pyeongchang

Although the weather is glorious in Gangneung, home of curling, it looks like the strong winds are affecting play elsewhere.

The women's slalom, which was due to start at 01:15 GMT, has been delayed by half an hour.

I'd pay good money to see Mr T try his hand at curling.

Switzerland have to nudge a British stone away from the centre of the house with the hammer in order to stop Kyle Smith's men going further ahead, but that means the men in red relinquish the advantage for the fifth end. Tense stuff.

Caroline Chapman
BBC Sport in Pyeongchang

Within Britain's Team Smith and Team Muirhead there are two sets of siblings, and they both have famous curling fathers.

David Smith, dad of men's skip Kyle and lead Cammy, is a former world and European champion.

Gordon Muirhead, dad of women's skip Eve, men's third Thomas and alternate Glen, is also a former world and European gold medallist.

Unfortunately Gordon didn't make it out to Korea to watch his clan in action.

"Someone has to keep an eye on the farm at home," Eve told BBC Sport.

"But he'll be watching every single game. Thomas's girlfriend Lucy has installed a TV in the lambing shed already."

Image source, Getty Images

Isabel: Tucked-up in bed watching Team GB in the curling, but counting down to the halfpipe finals! It’s gonna be a loooong night...

Cagey stuff so far on the furthest right of the four rinks. There is just one yellow, British, stone at the right edge of the house as we look from behind, trading places with the red of Switzerland. This could be another blank end.

Logan Gray
Former Scottish curler on BBC TV

What's happened here is that both teams have tried to be aggressive early on and they've cancelled each other out. Then there has been a really good take-out shot and that's just how it goes sometimes.

Certainly no team is going all-out as part of their strategy but there is definitely an attempt to play and get some action going.

Great Britain held the hammer for the first three ends because of the scoreless first two (the hammer, or last stone, only switches if there has been a score) and they may be disappointed with this return.

Looking to blank a third consecutive end, they leave a stone in the house and pick up a stone. It's a lead, but they may have wanted more.

Great Britain's Swiss opponents won bronze at the 2017 World Championships and beat Britain in the quarter-finals of the Perth Masters last month.

They are led by Peter de Cruz, who was born in London.

Caroline Chapman
BBC Sport in Pyeongchang

This is the first time I've been in the curling arena with a crowd, and it's a lot louder in here than I imagined.

Perhaps that's because the South Koreans are playing against the USA on sheet C.

When the host nation's team make a decent move, rigorous applause breaks out, before chants of 'USA, USA USA' try to interrupt it.

There seems to be couple of school trips in the crowd here, too. A few of the nippers are asleep already. The Olympic excitement has got to them.

Still scoreless after two ends.

This British rink is a youthful one - all five members of the squad are under the age of 30 - and they are playing together in a Winter Olympics for the first time. However, they won the world junior title as a collective in 2013.

Skip Kyle Smith is joined by brother Cammy and Kyle Waddell. Thomas and Glen Muirhead (Glen is not in the first-choice four) are the brothers of women's skip Eve.

Logan Gray
Former Scottish curler on BBC TV

Both teams are struggling to work out the ice conditions it seems at the moment.

Generally, we can expect the standard of play to increase as the game and the week goes on - as the teams get more accustomed.

It was always my preference to play the bigger teams earlier in the week however, before the pressure to pick up points really increases.

There are 10 teams in both the men's and women's competitions, all playing each other once in the group stage. The top four teams advance to the semi-finals.

Cast your mind back. Four years ago the GB men won silver and the women took bronze.

Still not sure?

Watch this...

We're into the second end after a blank first stanza. Great Britain has the hammer - the crucial final stone - in this end.

If your curling knowledge a little scratchy after four years away from the ice, stones, and sweepers?

The idea is to get your stones as close to the centre of the target as possible. If you get one stone closer to the centre than your opponent you get one point, two stones two points, etc.

Only one team can score per end and there are 10 ends in a match