World's largest aircraft unveiled

The 300-foot-long HAV304 is the world's largest aircraft. Credit: Chris Radburn - PA

The world's largest aircraft - part plane, part airship and part helicopter - has been unveiled in Bedfordshire in all its 300ft-long glory.

Known as the HAV304 or Airlander, the giant aircraft has been displayed at Cardington in the only hangar big enough to accommodate the 113ft (34m) wide and 85ft (26m) high monster.

The HAV304 at its launch at Cardington Hangar in Bedfordshire. Credit: Chris Radburn - PA

The ultra-green project was first flown in the USA but was unveiled today by pilot and Iron Maiden frontman Bruce Dickinson, who is an investor in the project.

Due to fly in the UK later this year, the craft is designed to stay airborne for up to three weeks and can be used for a variety of functions including surveillance, communications and delivering aid.