There's an early blow for Ulster as Rob Herring, just back from a calf injury, is forced off with in the opening quarter.

Tom Stewart is on in his place.

This hasn't been a great watch, if I'm honest.

Glasgow knock the ball on, and to add insult to injury, seal the ball off on the ground and give away a penalty.

Just a reminder about the tiebreakers in the URC.

Ulster are tied with Cardiff in the table and have a better points difference (78 to Cardiff's -25), but the Welsh side will remain above them in the table due to having more wins in the league (10 to Ulster's nine).

Good response from Cardiff with Taine Basham carrying hard. They have eaten into this sin-bin period and got away from the scrum battle.

Johan Mulder is victim of a high shot in the 22 and Cardiff have a decision to make, just as captain Liam Belcher returns from his yellow card.

They go for the corner...

Glasgow steal it again at the line out.

It hasn't clicked for Ulster so far.

The visitors look to get motoring again but Werner Kok, who will leave Ulster at the end of the season, forces a turnover scrum.

Zander Fagerson gives away a penalty and Flannery brings Ulster up to the edge of the 22.

Gwyn Jones
Former Wales captain on S4C

Cardiff have lost every collision in this game so far.

There are three Stormers forwards that all go as one there. It's impossible to stop.

The crowd here are trying to encourage the home side but what's the answer to that kind of power?

Glasgow have made good ground and are working their way into the Ulster 22.

Oh dear, oh dear.

Bryn Ward misreads a pass and it spills forward.

James Hume, back in the side after a neck injury, wins a penalty for Ulster on halfway.

Jake Flannery sends it into touch on the edge of the 22.

Richie Rees
Former Cardiff and Wales scrum-half on BBC Radio Wales

Cardiff didn't start the game with any momentum. It was a poor kick-off, four penalties on the bounce and now they're down to 14.

Stormers on the front foot already.

Two scrum penalties earn the chance to kick to the corner. Cardiff stop them illegally on the line and captain Liam Belcher is yellow-carded with just four minutes on the clock.

George Horne races into the Ulster half but he's isolated and Zac Ward turns him over.

That was a frantic passage of play.

Glasgow pinch Ulster's first line-out of the evening and look to set off in attack, but the hosts are keeping them pinned in their own half for now.

Off we go in Belfast for a huge 80 minutes of rugby!

We are under way at Hive Stadium.

Irish referee Andrew Brace blows his whistle and Ioan Lloyd gets us under way in the Cardiff sunshine, which could well cause a few issues under the high ball for home backs facing the River Taff End in the first half.

Reminder, if the hosts don't win then they will need a favour from either Glasgow or Edinburgh.