The pile, over 10ft tall and just as wide in clear plastic bags,demonstrates how much street litter is collected each day at a cost of £4m ayear.
The council says that cost is the equivalent of running a library service for a year; repairing 100,000 potholes; providing 210 residential care places for the elderly; or building half a primary school.
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Highs on Thursday of 18C.
Barnet Council ran the school, which was an institution for young people with learning difficulties.
Bowers pleaded not guilty of assaulting his ex-fiancee Sophia Cahill in Croydon in January.