Complex sentence: In 1858, Deptford was renamed the Royal Victoria Victualling Yard; it remained operational until 1961, after which a housing estate was built on the site (though some buildings/features were retained and converted for community use).
Split into simpler sentences: In 1858, Deptford was renamed the Royal Victoria Victualling Yard. Deptford's Royal Victoria yard remained open until 1961, after which a housing estate was built on the site (though some buildings/features were retained and converted for community use).