Computer whizzes at the University of Bath proposed 100 functions domestic cleaning robots could perform when idle, as part of a new paper, in which they reprogrammed a Roomba robot vacuum to be a mobile wireless charger, workout projector, home monitor and work-status signpost.

As well as playtime with a pussy and soaking flowers, the scientists also believe a robot vacuum could be reprogrammed to deliver breakfast in bed to a lucky recipient, close the windows in a home if it started raining, and transport shopping from a car to a kitchen.

Yoshiaki Shiokawa, first author of the study and a PhD student in the Department of Computer Science at Bath, said: "Mobile domestic robots, like robot vacuum cleaners and lawnmowers, are perceived as limited, single-task devices but there is a strong argument that they are under-used for practical tasks. For most of the day, they sit idle.

"We should be extending their utility beyond their primary tasks by programming them to physically navigate the home to perform a range of additional functions. Just think how much more efficiently households would run if Roombas could be converted into household assistants.

"Our study proved that after making minimal adjustments, a Roomba can serve multiple roles around the home."

Study co-author and supervisor Dr Adwait Sharma admitted robot vacuums could also use their downtime to help an elderly person to stand up from a sitting position.

He said: "Idle time presents unique opportunities for value-adding interactions and it aligns with the growing need for adaptable robots and integrated systems that can seamlessly fit into our daily lives. A robot vacuum could, for instance, use its idle time to monitor home security, water the plants or assist an older person to stand from a sitting position. These tasks tap into the robot’s advanced sensors, as well as its mobility."