Fancy lunch in London and dinner in New York?

If you have £4,000 to spare, it s a dream which could soon come true.

Richard Branson yesterday unveiled the prototype design for Baby Boom, a supersonic jet which can cross the Atlantic in just 3.5 hours.

A collaboration between Virgin Galactic and a US startup Boom Technology, the jet is set to fly at a speed of 1,451mph, 10 per cent faster than Concorde.

Engineers are now gearing up for the plane s first test flight in Southern California next year.

The plane is significantly smaller than Concorde, seating just 40 to 50 passengers, compared with Concorde s 92 to 128.

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