Last year, the newspapers were full of stories about the fatberg that was removed from a sewer in Whitechapel.

The Museum of London put a sample of it on display, in what proved to be a surprisingly popular exhibit among visitors. Although the fatberg pieces are no longer on display in the public galleries, the museum has announced that it will live-stream these samples online for the world to watch.

According to the Guardian, the samples changed while they were on display and since being removed from the museum at the beginning of July, further changes have been noticed.

Curator of social and working history at the museum Vyki Sparkes told the newspaper that an unusual toxic mould has grown on the fatberg samples in the past month.

She noted that the fatberg pieces became “very powerful museum objects, provoking strong feelings of fascination and disgust in our visitors”.

You might be wondering why a museum would want to preserve samples of sewage, which included wet wipes, sanitary products and other items flushed into our sewer system. Ms Sparkes explained that the museum is “preserving material evidence of how we live now and, as we change our habits and attitudes, fatbergs could well become history”.

This is a very unusual museum exhibit, and one that would have needed bespoke display cases to ensure it was safely on show to the public.

The Museum of London features varied exhibits, documenting the history of the UK’s capital. The earliest collection dates from 450,000 BC, before there was a city in this spot. There are other collections featuring items from the Roman era and exhibits relating the plague, Great Fire of London and the Blitz.