The Duke of Edinburgh surrendered his driving licence as prosecutors considered whether to bring charges over a crash that injured two women.
Philip escaped without injury on January 17 when the Land Rover he was driving flipped in a collision with a auto close to the royals' Sandringham residence in eastern England.
Britain's Prince Philip is driven away from Papworth Hospital in southern England December 27, 2011. Two women in the other vehicle were injured, though not seriously, and a 9-month-old baby boy was unhurt.
The Duke was photographed driving without a seatbelt 48 hours after the crash.
Police issued Philip with "suitable words of advice" and said "any appropriate action" would be taken if necessary.
The crash investigation file is now being considered by the Crown Prosecution Service, but Fairweather worries that Prince Philip's royal status will influence the outcome.
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The prince was not charged in the crash.
"I have been across that crossing any number of times and I know very well the amount of traffic that uses that main road".
On January 21, Prince Philip sent her a letter wishing her a "speed recovery" and that he "failed to see the auto coming", the Sunday Mirror reported.
Fairweather, who had previously spoken out about how disappointed she was over the lack of an immediate apology, went on to tell the Sunday Mirror how much she appreciated the note.
She told the newspaper: "I thought it was really nice that he signed off as "Philip" and not the formal title. I was pleasantly surprised because of the personalised nature", she said, adding, "He's tried to give an explanation so I appreciate that, whether I agree with it or not". Police said he and the other driver were both given breath tests for alcohol, and passed.
Fairweather said: "He's making the most sensible decision he can".
He also insisted that under "normal conditions", the accident wouldn't have happened.