The first section opened was between Walthamstow Central and Highbury &amp; Islington. There was no opening ceremony for this. The normal timetable started on 1 September 1968. The first train left Walthamstow Central for Highbury &amp; Islington at about 7:32 am. Later that year, the section between Highbury &amp; Islington and Warren Street was opened. Again there was no ceremony.
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