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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A man who fired at officers from the National Crime Agency has been convicted at the Old Bailey.
Want to know its posh name? It's a 'Track Retrieval Device'.
Unite said its members in the capital's 18 bus operators had supported walkouts by 85%, and action short of a strike by 9-1.