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For their investigations, the researchers combined physiological studies - such as imaging techniques to visualise processes in the fly brain, chemical analyses of environmental odours, and behavioural studies.

Researchers who examined nine mummies found that though there was some difference in the intensity of their odours, all could be described as "woody", "spicy" and "sweet".

Staff at the terminus in the city centre said the odour had been lingering inside the building for at least 10 days.

It wasn’t a horrible odour, but not like something I had smelt before.

It said that noise and odour remained within permitted levels - regulated by the Environment Agency - and any complaints were fully investigated with feedback provided to residents.