King Charles warned that he had gone too far on Brother Andrew

Concerns about isolation around Andrew are compounded by the lack of staff accommodation at Marsh Farm.

Andrew will reportedly rely on ad hoc support from Sandringham staff rather than trusted assistants who have worked for him for a long time.

“It has been very poorly received by Andrew,” said our palace mole.

“Each new restriction only reinforces the feeling that his status and self-esteem are slowly being dismantled, making him feel less and less one step at a time.”

Andrew’s ex-wife, Sarah Ferguson, 66, has been helping him sort through belongings and documents, with sensitive papers being handled by a former secretary.

The pair have remained close despite divorcing in 1996, and sources say Ferguson is also concerned about Andrew’s welfare.

A friend said: ‘She is genuinely concerned about his state of mind and how he performs under pressure. From her perspective, he is struggling to cope with the magnitude of the changes being forced upon him, and that has become a serious concern.”

For Charles, the situation has become a source of anxiety.

A palace source said: ‘There is a genuine fear that the sheer humiliation associated with Marsh Farm could push him beyond his limits. “A number of aides feel the king has crossed a line, and they are deeply concerned about the potential damage this could do to Andrew’s mental health.”