Away from the speeches by the chancellor and the PM, Nigel Farage has also been speaking.
The Reform UK leader has been unveiling the party's new chairman after Zia Yusuf walked out last Thursday over a row about banning the burka, only to rejoin the party two days later in a different role.
Speaking at the press conference today, Yusuf said he is "hugely fortunate" and feels "very blessed to be back amongst this amazing team".
It's now been revealed that Dr David Bull will be the new chairman of Reform.
Yusuf said Bull will do "an incredible job".
Reform also announced that the role of chairman has now been re-imagined, after Yusuf was said to have left due to "exhaustion".
Farage explained that the party has divided the role of chairman to ensure there is less office work for Bull, following Yusuf's departure.
He explained: "David's job is not to get involved in the admin, is not to get involved with the tech.
"It's to give leadership, and above all, it's to give leadership to that volunteer army out there, of people, of 450 branches. They're going to be seeing an awful lot of Dr David Bull over the coming years."
Bull said he was "delighted" to take up the role and called Reform the "fastest growing political party this country has ever seen".
The broadcaster and presenter said he would find "skeletons in the closet" of the Conservative Party, as well as Labour.
Bull previously was a member of the Brexit Party, and claimed Reform UK was founded in his kitchen, serving as deputy leader while Richard Tice was in charge.
He pledged that Reform will "become the governing the party of the United Kingdom", will make Farage PM and ended his speech by quoting Bob the Builder.
"Can we do it? Yes, we can", he said.