Complex sentence: By 1908 a new Chief Office for the Co-operative Insurance had been built at 109 Corporation Street, Manchester, which served as their head office until 1962 when they moved to the CIS Tower on Miller Street, barely 100 yards distant.
Split into simpler sentences: By 1908 a new Chief Office for the Co-operative Insurance had been built at 109 Corporation Street, Manchester. This served as their head office until 1962 when they moved to the CIS Tower on Miller Street, barely 100 yards distant.