By Michael Holden and Sachin Ravikumar LONDON (Reuters) – The tens of thousands of people queuing to file past the coffin of Queen Elizabeth were warned on Friday that it would now take up to 24 hours to reach the building, and that temperatures overnight were expected to be cold. People of all ages and from all walks of life have paid their respects to the late queen, joining a well-organised line that stretches along the south bank of the Thames then over the river to parliament’s Westminster Hall. Such has been the demand that by mid-morning organisers decided the line was too long and urge…