Complex sentence: In 2013 the council was obliged to finalise single status across its workforce, resulting in a strike of its refuse collectors and street cleaners, whose allowances the council reformed to equalise them with other staff at the organisation conducting similar work.
Split into simpler sentences: In 2013 the council was obliged to finalise single status across its workforce, resulting in a strike of its refuse collectors and street cleaners. Their council reformed their allowances to equalise them with other staff at the organisation conducting similar work.