A source claimed royal aides are continuously working round the clock to ensure the day runs smoothly.
But, according to the Mirror, a number of issues still remain. Seating plans are still not arranged, with some claiming this is due to Prince Harry and Meghan, Duchess of Sussex, still not confirming their attendance.
There are also fears the King could stumble over his elaborate robes in front of a TV audience of 100 million.
And there is said to be debate amongst organisers on what route the Coronation procession will take – with some wanting to keep costs down to avoid scrutiny.
There also seems to be confusion as to whether or not the women will wear tiaras into the church before the Queen Consort enters the Abbey.
Prince Andrew is also said to be frustration over being unable to wear his Garter Knight robes after he was stripped of his titles.
With the event being held on May 6, organisers are desperate to solve these issues as soon as possible.
The event is set to be watched by millions around the world – adding to pressure on the organisers to get plans in place.
READ MORE: Harry warned its ‘unwise’ for him to skip King’s Coronation
Sources told how the King and Queen Consort have been rehearsing their roles in a “mock-up Abbey” at Buckingham Palace.
Charles was said to have commented on how heavy his robes were during a fitting – leaving aides with “real fears” that he may stumble over them during the event.
It has been reported that craftsmen are creating a ramp to help Charles walk up to the Chairs of State where he will sit, alongside Camilla, after being crowned.
Speaking about the debate around tiaras being worn, one insider told the Mirror: “Senior female royals were only informed of outfits this week prompting a rush to finalise fitting arrangements.”
Other royal sources tried to offer some reassurance, saying: “It’s fair to say it will go down to the wire, but there is huge confidence everything will go to plan on the day.
“This is naturally a huge event and the important point is everyone is pulling in the right direction.
“The King and Queen Consort want it to be perfect as does everyone involved which is why everything is being done to make it so.”
The Coronation is set to last 90 minutes, making it considerably shorter than the late Queen’s coronation in 1956 which lasted three hours and 20 minutes.