Oh yeah? I didn't know all this. I thought the law was that the first 10 in the succession had to be protected.
No there is no place that needs protection as such.
Remember the Peter and Zara have never had protection and when they were born they were 5th and 6th in line. Princess Margaret's kids also have never had protection and until 1977 they were 6th and 7th and have steadily moved down as Peter, Zara, William, Harry, Beatrice, Eugenie, Louise and then James were born. Peter was in the top 10 until Louise was born which was when he was well into his 20s. Lord Linley was also in the first 10 until well in his 20s (until Beatrice was born in 1988) and he also never had protection.
Even the Duke of Gloucesters and Kent haven't had full time protection all their lives and yet at times they were also in the first 10.
These days outside of the Queen, Philip, Charles, Camilla, Wiliam, Harry, Andrew, Beatrice, Eugenie, Edward, Sophie and Anne no one has full time protection but the Gloucesters and Kents get it when on official duties only.
Personally I think the first 5 should have it 24/7 and other than that only the children of the monarch but not their children or spouses so that would mean The Queen, DoE, Charles, Camilla, William, Harry, Andrew and Beatrice but not Eugenie, Sophie, Louise, James or Anne's children etc.