Nicknamed the “Baby Boom”, the 40-seater airliner can fly from London to New York in 3.5 hours at a speed of 1,451mph.

Sir Richard Branson has unveiled a prototype for a supersonic passenger airliner which its designers claim will be able to fly passengers from London to New York in three-and-a-half hours for an “affordable” $5,000 return ticket.

Nicknamed the “Baby Boom”, the XB-1 Supersonic Demonstrator, which looks likes a mini Concorde, is expected to have its first test flight next year in Southern California.

The venture is a joint project between Sir Richard’s Virgin Galactic and Denver-based US firm Boom Technology.

“I have long been passionate about aerospace innovation and the development of high-speed commercial flights,” said the billionaire Virgin Group founder.

“As an innovator in the space, Virgin Galactic’s decision to work with Boom was an easy one.

Source: Baby Boom: Branson unveils supersonic jet faster than Concorde