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Aliens exist and it is possible they are already here on Earth, according to the Sheffield-born first British astronaut to go into space.

Speaking to the Observer Magazine, Dr Helen Sharman said: "Aliens exist, there's no two ways about it. There are so many billions of stars out there in the universe that there must be all sorts of different forms of life."

She added that although they may not be made up of carbon and nitrogen like humans, "it's possible they're here right now and we simply can't see them".

Dr Sharman, 56, made history when she participated in a mission to the Soviet modular space station Mir in May 1991.

First Briton in space Helen Sharman CMG OBE

In the interview, she highlighted how she is often referred to as the first British woman in space, rather than simply the first Briton.

Aliens may 'already be here on earth' according to Sheffield-born astronaut