Prince Charles has privately condemned Priti Patel’s Rwanda asylum plan.

Risking a major clash with No 10, he is understood to have said that giving Channel migrants a one-way ticket to Africa was ‘appalling’.

But a High Court judge last night threw out a bid to halt the first charter flight to Rwanda, due to take off on Tuesday. Mr Justice Swift said he had to balance the concerns of individual migrants with the wider public interest.

The Daily Mail has learnt there has been friction between the heir to the throne and Boris Johnson, with each grumbling about the other being late for official appointments.

Allegations of tensions between the two men echo reports of the strained relationship between the Queen and Margaret Thatcher when she was PM.