Complex sentence: Birmingham City Council was eventually depleted of funds for the maintenance of the blocks and lift breakdowns became common, and were further aggravated by repairers refusing to work without security enforcement.they were also reports of teenage troublemakers setting fire to the staircases in the tower blocks.
Split into simpler sentences: Birmingham City Council was eventually depleted of funds for the maintenance of the blocks and lift breakdowns became common, and were further aggravated by repairers refusing to work without security enforcement. They were also reports of teenage troublemakers setting fire to the staircases in the tower blocks.