We've covered prefab hotel rooms in Amsterdam. Now Reuters UK reports:

You see a vacant east London building lot paved over with asphalt and used as a car park. Tim [Pyne] sees the site of a rack-'em, stack-'em prefab temporary designer boutique hotel.

An architect with years of experience designing temporary buildings for exhibitions, [Pyne] says prefab is the answer for a city like London, where quick development means a shortage of space, and shabby areas are suddenly chic.

His design is called the M-Hotel and it consists of a steel frame with trailer-style mobile homes fitted out with designer furnishings, stacked four high...

Jetson Green says:

I love the possibilities and ideas ... it's cool and innovative. The m-hotel is designed as a series of steel-framed slot boxes that slide into the frame (which makes for easy dismantling in the future). 

Also from Tim Pyne: The m-house.