The Isle of Man's Matthew Bostock is going for it! He's sped forward and will defend his lead from the front.

Two laps to go.

Five laps to go. It's getting tense!

Gareth Bailey
BBC Sport Wales at the Sir Chris Hoy Velodrome

The way the riders put on the afterburners when the bell goes here is like having a slightly overzealous toddler with a Scalextric controller.

Impressive speed when you've been riding 150 laps so far

There's an Australian trio leading the way at the front as we approach the penultimate sprint. They're trying to boost Oliver Bleddyn's chances.

And it works! The Aussie rider takes the five points.

The Isle of Man's Matthew Bostock claims three, but his lead is cut to five points.

Gareth Bailey
BBC Sport Wales at the Sir Chris Hoy Velodrome

All three Welsh riders in this race are called William so essentially it's the most efficient day for the Welsh supporters ever.

Three for the price of one.

It's Will Perrett still in with a shout of a medal in sixth place as Will Roberts and Will Salter trail in 10th and 14th with not long left.

Wales' William Perrett is launching an attack. If he can lap the rest of the field it would move him into the podium places.

The other riders aren't having it.

Three more points for Matthew Bostock. That's him seven points clear of liver Bleddyn in the silver-medal position.

Mark Stewart wins another sprint! Another five points moves him into the bronze medal position on 55 points.

The Isle of Man's Matthew Bostock remains in the lead with 75 points.

Just 28 laps to go now!

Amy Canavan
BBC Sport Scotland at Sir Chris Hoy Velodrome

Never mind just racing round this track 160 times, thinking - and reminding yourself - of a plan of attack? Dearie me.

Unless you're Mark Stewart - who is currently seventh - that is. He never has a plan.

Scotland's Mark Stewart takes the next five points. He's only three points away from a place on the podium.

New Zealand's Keegan Hornblow hurls himself up the standings as he kickstarts a solo attack and laps the field. That takes him up to sixth.

We've got a new leader! The Isle of Man's Matthew Bostock, along with Olivier Bleddyn of Australia, launch a move and they lap the field for a third time.

Bostock leads on 72 points with 54 laps to go.

Twenty points for Wales' William Perrett and he's up to second with 50 points.

Bermuda's Conor White is the only rider who hasn't picked up a point yet.

Ah! Scotland's Logan Maclean was going for the five points there, but he's pipped across the line by Australia's Blake Agnoletto and he has to settle for three.

At least he's on the board now.

Matthew Bostock of the Isle of Man has moved up in the standings.

A 20-pointer for lapping the field helps him storm up to third with 49 points, just two behind New Zealand's George Jackson in the gold-medal position.

There's a long, long... long way to go, though.

Amy Canavan
BBC Sport Scotland at Sir Chris Hoy Velodrome

This actually is ridiculous, isn't it?

Sixty laps down. Just 100 more to go.

I'm exhausted just watching them out there.

The Welsh riders claim the big points on the latest sprint, with William Perrett getting the five and William Roberts claiming three.

Perrett is sitting in second with 27 points.