Plaid's Rhun ap Iorwerth expected to become Wales' first minister on Tuesday

Rhun ap Iorwerth is expected to be confirmed as first minister at the Senedd's first meeting since his historic election victory.

Plaid ended Labour's century-long election winning streak in Wales, and 27 years in charge in Cardiff, on Thursday.

The route is clear for ap Iorwerth to be confirmed, because Labour and Lib Dem Jane Dodds are expected to abstain, while the Greens' two MSs have said they will support Plaid.

Ap Iorwerth will be the first head of the Welsh government not to be from Labour.

The new 96-member Senedd will also need to decide who will be the Welsh Parliament's new Llywydd, or speaker - with Labour's Huw Irranca-Davies and Conservative's Paul Davies' names in the frame.

Members of the Senedd will be asked one after another who they think should be first minister.

Ap Iorwerth has enough votes to take the job and there are not enough available for anyone else, such as Reform's Dan Thomas, to challenge him.

It is not known what the Welsh Conservatives will do during the roll call but even if they supported Thomas he could not defeat Plaid's block with the Greens.

After the roll call ap Iorwerth will need to be sworn in by a High Court judge before he becomes first minister.

On Monday it was not clear if the vote would go ahead, because of uncertainty over who will take the deputy presiding officer job.

But a Plaid Cymru spokesperson has said that the party will put someone forward, but as of Monday night it was not known who that might be.

When the presiding officer is from the opposition, as both Irranca-Davies and Davies are, then the deputy presiding officer must be from the government.

If the party does not nominate someone it would delay ap Iorwerth becoming first minister.

Plaid will hold a meeting of their 43-member Senedd group on Tuesday morning.

Plaid Cymru won 43 seats last Thursday - six seats short of a majority.

Despite this, at the party's victory rally on Saturday ap Iorwerth promised to go it alone.

It means Plaid will likely need help from another party for crucial votes.

Ap Iorwerth said at the rally: "Throughout our nation people have put their faith in Plaid Cymru in numbers never seen before."

"We will do everything we can to repay the faith that people have put in us," he added.

Reform won 34 seats in the Senedd, enough to make the group the second largest in the Welsh Parliament. It is now expected to form the largest part of the opposition.

At the weekend Reform Blaenau Gwent Caerffili Rhymni MS Llŷr Powell said his party intended to "add a higher level of scrutiny" to Cardiff Bay proceedings.

"We really need to make sure we get into the detail of what this new government will do.

"The budget will be a priority for us to make sure money goes where it needs to."