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 lamp in the tower which houses Big Ben is to be switched off for the first time in more than 70 years.
Sir Bruce entertained audiences for more than seven decades.
Work in the tower will also pause over the bank holiday weekend.