Not pretty from Lamin Deen and his team. A messy run ends in a time of 49.44 seconds... only Australian pilot Lucas Mata have fared worse so far.

There's a bit of a breeze whipping around Red Gerard's bib has he charges down the big air slope.

It's a solid but unspectacular jump from the American. 74.75.

Here's Britain's Billy Morgan...

Oh dear. A slow start leaves the Brits playing catch-up...

Let's dash over to the bobsleigh. Here's Lamin Deen and his crew...

Here we go then in the men's big air final.

First to drop is 17-year-old American Red Gerard. Those of you who have been following throughout these Games will remember Gerard won the slopestyle way back on day two.

Britain's Billy Morgan will follow the American as the second to jump.

Image source, Getty Images

Competitors build up speed by riding down a massive ramp, then perform tricks off a big jump.

The ramp in Pyeongchang is the biggest in the world at 49 metres, with a slope that reaches 40 degrees at its steepest point. Like many freestyle events, judges determine the winner.  The event begins with a qualification round in which riders are drawn into heats according to their world ranking.

• Each rider has two jumps. Only their best score is taken into account, with the top 12 athletes qualifying for the final. This can be taken from the top six in two heats, or the top 12 in a single heat.
• In the final, each athlete has three jumps – with their top two scores counting.
• Competitors jump in reverse order of their qualification results.
• In the event of a tie, the highest single score given by any of the judges will decide ranking.

Think big air sounds like the newest release by a sports trainer giant? Then you might want to know a bit more about it...

GB snowboarder Aimee Fuller speaking about team-mate Billy Morgan on BBC TV:

"Billy's full of adrenaline after qualification. He's had a bit of an ear issue which hasn't been great for his balance, but he's a trouper.

"He's got a new trick so we can look forward to seeing that.

"The kicker is an amazing jump. It's maybe not one of the biggest, which means the boys are under a lot of pressure.

They're going to have to go big at the bottom, there is less air time, so in terms of big tricks, it's all to play for."

Flick over to BBC One now...

Image source, AFP

Billy Morgan, speaking to BBC TV:

"The build-up to this Olympic Games has been similar to that of Sochi. We have the same goal but the tricks have moved on a lot since then.

"You can expect me to try my hardest. I don't like to think about whether i can get a medal but it's such a roll of the dice on the day."

Anna Thompson
BBC Sport in Pyeongchang

Billy Morgan is the oldest man in the big air final field at 28 and has 11 years on the youngest, the USA’s Red Gerard.

Will his wise old head count today?

Well Morgan only started snowboarding at the age of 14 on a dry slope in Southampton so hasn’t got many snow years experience as many of the others have.

But he does have the big tricks to challenge.

There will be three runs each with the top two highest scoring jumps added together.

Morgan was the first in the world to land a backside 1800 quad cork but he has never attempted one in competition before.

Will he attempt one in his final jump today? I’m not sure the jump is big enough, at just under 5m, to give him enough air time to get his rotations round.

But we’ll see.

Image source, BBC Sport

So that's what's happening shortly at the Olympic Sliding Centre. Over to the Alpensia Ski Jumping Centre....

Nick Hope
BBC Sport in Pyeongchang

Image source, BBC Sport

Four years ago the GB four-man team finished an impressive fifth, just 0.11 seconds off the podium, but are in line to receive a retrospective bronze medal after the disqualification of two Russian sleds for doping offences.

Following the retirement of John Jackson and Stu Benson as well as a pre-Games minor stroke which ruled out Bruce Tasker, only Joel Fearon remains from the line-up.

He will team up with pilot Brad Hall, Greg Cackett and Nick Gleeson in one of two British four-man teams who believe they can challenge for a medal.

The other sled - Lamin Deen, Ben Simons, Toby Olubi and Andrew Matthews (pictured) - have also been on a World Cup podium this season.

Neither have looked particularly strong in training runs this week, but both have talked up their chances - so will they have something special to unleash on the first day of competition?

Got a TV? Got a mobile? Excellent. You're going to need both of them to hand. That's because we're going to have a British double header in about 10 minutes time.

Our bobsleigh teams, led by Lamin Deen and Brad Hall, will be starting their bids for glory about the same time as Billy Morgan goes in the big air.

Let's find out more...

Image source, AFP

Johannes Lochner and Francesco Friedrich shared last year’s world title, having ended with identical times – the first dead heat in the history of the championships.

And to top that, Friedrich and Thorsten Margis shared gold with Canada in the two-man bob on Monday.

That can't happen again - can it?

Here's Friedrich and his crew... they steam down in 48.54 and take top spot from the South Koreans.

John Jackson
Two-time Olympic bobsledder on BBC TV

It's an average start to the competition from Johannes Lochner. Nobody can win medals today but they can certainly lose them.

His start was world-class but corner two cost him.

Image source, Getty Images

The German sleds are among the favourites for this four-man bobsleigh event but Johannes Lochner has made a scratchy start to his competition.

His sled finishes three tenths behind the South Korean team.

John Jackson
Two-time Olympic bobsledder on BBC TV

At this point, it's just about getting the first run down and trying to be consistent.

If you can have four consistent runs, it's always going to help your performance.

South Korea are the early frontrunners, having clocked a seasonal best of 48.65 seconds. The natives are happy. Next up? The first of our Germans...

Germany ended in the top three positions in this season’s World Cup, and they also recorded a 1-2-3 at last year’s World Championships, albeit with the benefit of home advantage in Konigssee.

All three of their pilots – Francesco Friedrich, Johannes Lochner and Nico Walther – are potential gold medallists. Lochner kicks us off...

Great Britain has two sleds competing in the four-man bobsleigh competition which has just got under way.

Lamin Deen's team goes 15th in the first heat. Dean is joined by Ben Simons, Toby Olubi and Andrew Matthews.

Brad Hall's team, which also includes Nick Gleeson, Joel Fearon and Greg Cackett, will go shortly after in 17th.

GB are targeting a top-five finish in the event but both sleds were down the pecking order in practice. Deen's sled was the slightly quicker, their best run timed at ninth fastest, while Hall's best across the six sessions was only 14th fastest.

Image source, PA