This body appointed an Apportionment Committee to liaise with the London County Council to apportion between the two bodies the old central meeting halls and other civic properties and responsibilities. It was decided to seek Middlesex Guildhall, Westminster, as the headquarters of the county council (extra-territorial but convenient to local-line terminus railway stations). The justices of the peace for Middlesex met to consider county business for the last time on 28 March 1889 at the Sessions House, Clerkenwell. The Sessions House duly passed to the London County Council, and Middlesex County Council came into official existence on 1 April 1889.
