Re: British Standard double decker buses and things
The Brisbane fatbergs are described by Australians as the size of a Plane; 747s to be precise.
https://www.stuff.co.nz/world/australia/87669859/brisbanes-planeized-fatbergs-and-how-were-making-them-worse
In Michigan USA they compare theirs to Blue Whales; the Baltimore USA fatberg was merely compared to an Iceberg. However, worse than Britain that one sent 250 gallons of raw sewage onto the streets.
https://www.baltimorebrew.com/2017/10/16/what-was-lurking-beneath-charles-street-a-colossal-fatberg/
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Then again, why 'RAW' ?