After five years of preparation, Roberts has brought together 400 objects that focus on the lives - and deaths - of the citizens of Pompeii and Herculaneum.
More than 250 archaeological remains from the lives of people in the Roman cities of Pompeii and Herculaneum will feature in a new exhibition at the British Museum next year.
The event will be the first about Pompeii and Herculaneum in London for 40 years and will bring together recently discovered objects and finds from earlier excavations, many of which have never been seen outside Italy.
The double portrait - the only one of its kind to have been found in the area - is one of the highlights of the British Museum's Life and Death in Pompeii and Herculaneum which opens this week.
The Archaeological Areas of Pompeii, Herculaneum and Torre Annunziata, contains the vestiges of two flourishing cities and numerous villas that were engulfed in ashes and lava when Mount Vesuvius erupted on 24 August 79 AD, leaving the site buried until the beginning of excavations started in the middle of 18th centuries.