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Sometimes, the shapes in “Pluriverse assembly” suggest familiar objects — a simple light bulb, for instance, or a changing typology of ancient Greek vases, like an amphora or an oenochoe jug.

Goods like olive oil and wine were imported to Britain using large ceramic jars known as amphora, but Romano-Britons "produced their own big jars which could rival this pottery", said Mr Biddulph.

Over two days at sea this May, the vehicle mapped the site and determined that the amphorae rested in a vessel half-embedded in sediment.

This dietary change was linked to the creation of small cups and handled amphorae.

It dates from about the 1st or 2nd Century BC and was found laden with hundreds of amphorae - a type of Roman terracotta jar.