Context: Elizabeth's personal fortune has been the subject of speculation for many years. Jock Colville, who was her former private secretary and a director of her bank, Coutts, estimated her wealth in 1971 at £2 million (equivalent to about £25 million today). In 1993, Buckingham Palace called estimates of £100 million "grossly overstated". She inherited an estimated £70 million estate from her mother in 2002. The Sunday Times Rich List 2015 estimated her private wealth at £340 million, making her the 302nd richest person in the UK.

Question: What has been a subject of speculation concerning Elizabeth's wealth?
Answer: personal fortune

Question: What was Elizabeth's wealth extimated to be in 1971?
Answer: £2 million

Question: What did the palace call estimates of Elizabeth wealth in 1993?
Answer: "grossly overstated"

Question: What did the Sunday Times estimate Elizabeth's fortune to be in 2015?
Answer: £340 million

Question: Where does Elizabeth's wealth place her in the list of the richest in the UK?
Answer: 302nd

Question: In what year did Jock Colville become Elizabeth's private secretary?
Answer: Unanswerable

Question: How much was Elizabeth worth in 1993 according to Buckingham Palace?
Answer: Unanswerable

Question: Who is the wealthiest person in the UK as of 2015?
Answer: Unanswerable

Question: In what year did Jock Colville leave Elizabeth's service?
Answer: Unanswerable

Question: In what year did Jock Colville become the director of the Coutts bank?
Answer: Unanswerable