More than 250,000 people went through Westminster Hall to see the Queen lying in state in days leading up to the state funeral.
The queue to allow mourners to pay their last respects to late monarch was shut several times after the crowds exceeded the planned 10 miles.
Culture Secretary Michelle Donelan said the final tally was still being worked out but confirmed that more than a quarter of a million people filed past the Queen's coffin over the four-day period.
