There was a company at Cardington working on building a massive cargo carrying airship, I haven't heard any more for years. I know the US military were interested in it.
I is called the SKYCAT and I am not sure they have finished it yet although it was meant to be flying in 2006...
Advanced Technologies Group SkyCat, United Kingdom
The SkyCat hybrid air vehicles, supplied by Advanced Technologies Group, based in Cardington, Bedfordshire, UK, combine lighter-than-air airship technology and air-cushioned hovercraft technology. The vehicle will be built in three variants, the Skycat 20, 200 and 1000 with payload capacities from 20,000kg to 1,000,000kg. The first SkyCat will be the SkyCat 20 for which the first flight is anticipated in 2006.
In July 2005, the Advanced Technologies Group Ltd went into administration under Part II of the Insolvency Act 1986. The future of the development programme of the SkyCat is thus uncertain.
The air cushion landing system allows the vehicle to land on flat land, grass, swamp, snow or on water, giving the vehicle fully amphibious capability. The landing system also allows the airship to land without the normal lighter-than-air airship ground crew and ground landing infrastructure.
The SkyCat can be configured as a passenger airship, an ultra heavy cargo ship and as an airborne surveillance platform. Military applications include tactical and strategic air lift, a command, control, computers and information platform, mine countermeasures, airborne early warning and anti-surface warfare.
http://www.aerospace-technology.com/projects/skycat/