Eric O’Sullivan comes on to bolster the Ulster scrum as the snow reappears.

Zac Ward brings Ulster up to the Munster line but the visitors hold out and win the scrum.

Jack O’Donoghue the latest to be introduced for Munster with Alex Kendellen making way.

Jake Flannery is on the field for Ulster, while Munster introduce Jeremy Loughman, Conor Bartley and Ethan Coughlan.

The try is not awarded but Ulster have a penalty and they are driving.

Jacob Stockdale in on the corner but on-field decision is 'no try'. The TMO taking a look...

Bryn Ward with the break. Ulster knocking on the door once again.

That's three out of three from Doak who finds his range again and gives his side a little more breathing space.

Ulster win a penalty inside Munster territory and Nathan Doak is lining up a kick.

We are back under way in Belfast as Jack Murphy kicks off.

Stephen Ferris
Former Ireland and Ulster flanker on Premier Sports

It feels like a mistake could decide the outcome of this match.

That was indeed it as the ball is shipped out of play and Ulster go in with a slender advantage. Two Nathan Doak penalties gave them the lead with JJ Hanrahan kicking one of his own.

Both sides have had try-scoring opportunities, but are yet to capitalise.

It's turned quite scrappy so the teams will seek to reset at the break.

Ulster on the attack again with Stuart McCloskey driving up to the 22. The ball is ultimately worked out to the left, but Jacob Stockdale knocks on. That will probably be the final significant act of the opening period.

Jonathan Bradley
BBC Sport NI senior journalist at Affidea Stadium

A couple of Werner Kok's kicks tonight won't win any prizes for aesthetics but they've certainly been effective.

That's twice now he's put boot to ball and produced a knock-on.

And another handling error from Munster. Ulster have the put-in again for what has turned into a stop-start affair.

Now it's Ulster's turn to make the handling error as Bryn Ward spills the ball forward.

It's been a bit scrappy with Munster coughing up possession again with Fineen Wycherley unable to hold on to the ball.

Jonathan Bradley
BBC Sport NI senior journalist at Affidea Stadium

This the danger when you don't turn your pressure into points.

Ulster have played all the rugby in the first half hour but, after one mistake from a restart, Munster were pressing to take the lead.

The hosts get away with just three points conceded but that should be a lesson.