The last person to lie in state in the UK was the Queen Mother back in 2002.
Queen Elizabeth, the Queen Mother, died on 30 March 2002, and lay in state for three days in Westminster Hall where people could visit. Her funeral was held in Westminster Abbey on 9 April 2002.
It is estimated that 200,000 people attended her lying in state to pay their respects. Much higher numbers are expected the Queen, who will lie in state from 5pm on Wednesday 14 September until the morning of her funeral at 6.30am on Monday 19 September.