Serpentine pavilion 2015: So where’s the function?

This year’s Serpentine pavilion, by Spain’s José Selgas and Lucía Cano, is as playful a work of art as you could wish to hold a sponsor’s party in – but as architecture it misses an important pointOn the edge of a field in Somerset, with a view of a cricket pitch and in an ambience of all-round rural Englishness, is an object on which so many metaphors have been expended that it needs no more now. Just the facts: this is the 2014 edition in the Serpentine Gallery’s series of annual t