LONDON .- The Serpentine Gallery will stage the first major UK exhibition by Swedish artist Klara Lidén. The exhibition will include a series of films showing the artist performing actions in both public and domestic spaces. The films will be presented with newly commissioned architectural structures created by Lidén to respond to the context of the Serpentine Gallery. Lidéns varied body of work has included building a house from discarded materials on the banks of the River Spree in Berlin, constructing paintings made from the accumulated layers of billboard posters, setting up an alternative free postal system in Stockholm and filming herself performing a wild dance amongst commuters on a train. Lidéns films, which capture the actions she undertakes in public urban spaces, show her challenging the intended functions of the materials and spaces around her. Her psychologically laden performances are often