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Lydia Mugambe was studying for a PhD in law at the University of Oxford when officers discovered she had a young woman at her home carrying out unpaid work as a maid and nanny.

Mr Shiokawa, a PhD student in the department of computer science at Bath, said the project proved that "after making minimal adjustments, a Roomba can serve multiple roles around the home".

Sam Wainman is a PhD doctoral researcher in Hoarding Disorder at the University of Birmingham.

He tells me that I am allowed to try it them out, but taster-in-chief is someone far more qualified: Helen Sharman, the UK's first astronaut, who also has a PhD in chemistry.

She is, or was, a PhD candidate in Child Study and Human Development at Tufts University.