While the nature of Donald Trump's second state visit is indeed unusual, from the moment Sir Keir Starmer delivered the gold-edged invitation it began a process steeped in tradition.
State visits are usually reserved to one per head of state, with Trump last hosted by Queen Elizabeth II in 2019.
Typically, second-term US presidents are offered a shorter visit, perhaps tea or lunch with the monarch at Windsor Castle. But the red carpet is literally being rolled out once again, with Trump receiving a second full state visit, with all the pomp and pageantry it entails.
An indication was given early on in Trump's second term that he'd be receptive to a second state visit, and so - on perhaps the advice of the new prime minister - the King issued a second invitation.
The greatest form of tradition is one that always evolves, and so this may now set a new precedent for presidents who are voted out but then return to serve a second term.
Any nation can hold a state visit, but what is unique about Britain remains our internationally respected pageantry.
Even down to the very invitation - there is a very precise format for inviting someone on a state visit.
An invite must be issued, established by international law. Written on a special gold-edged paper, embossed with a golden coat of arms that is issued, it forms part of a historic archive.
Breaches of protocol
Much has been made in the past about moments where protocol was breached - Michelle Obama famously put her arm around Queen Elizabeth in 2011, but, in all honesty, I doubt very much the Queen was upset by this.
The fuss was not made by the late monarch, who accepted that what mattered was that Americans should be made very welcome on behalf of the UK.
And then criticism emerged against Trump, who appeared to make the Queen change places when the Guard of Honour was to be inspected.
But, in truth, it was Elizabeth II who had to correct herself because, in her long life as sovereign, she never escorted a visiting president.
The escort should stand further from the troops and her self-correction was misinterpreted as his error.
Trump's visit this time will likely generate just as many headlines, but I don't think there will be critical moments where a breach occurs.
What it means for Trump - and is it worth it?
Trump's mother would cut out and keep in a scrapbook containing pictures of the young Princess Elizabeth and her sister, Margaret Rose. It was an era before endless celebrity news, a time when public life revolved around the royals, the war, and survival.
And the president loved his mother, like many men do, so these things mean an enormous amount to him.
Read more:
No state visit has had a backdrop quite like this
When the horses go back to the stables and the carriages are put away, the impact of this visit will remain fresh in the mind of a president who may feel his nation - and maybe even he himself - have been affirmed by their ally.
Quite apart from the politics, although much will be said and written on that, there is one great hope for any state visit: that the country so many (myself included) have fought for can be safer and more successful as a result of the pomp and pageantry on display.
(c) Sky News 2025: Trump will be treated to full pomp and pageantry - and no one does it better than Britain
In pictures: Donald Trump given royal welcome as UK state visit begins
Ricky Hatton was 'in a good place' before death, his family says
Woman shot by husband on Valentine’s Day after trying to escape relationship
Ex-Labour councillor charged over Westminster blackmail allegation
Edinburgh charity worker embezzled nearly £30,000 from vulnerable and disabled victims
Human remains found in Loch Lomond identified as missing man as police probe 'unexplained death'
Labubus: Fake dolls seized 'falling to pieces' amid warnings they 'could be fatal'
Hillsborough Law: What is it, why was it delayed and what happens next?
New AI model could predict risk of disease a decade before symptoms
