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Last Updated: Friday July 23 2010 04:39 GMT

Ore goes down London's fatty sewers

Ore goes down into a sewer

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A huge clean-up of the sewers under London's Leicester Square is going on.

The gutters are clogged up with years and years of cooking fat that people have chucked down the sink or toilet.

Cooking fat is runny when it's hot, but it sets when it cools down - and this blocks up sewers.

We sent Ore underground to meet the 'flushers' who have a lot of dirty work to do!

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