Comment: Happy Hayward

On the gallery's roof, an exhibit in its current Psycho Buildings show of artists' responses to architecture allows visitors to float in rowing boats far above the noise and bustle of the South Bank's other arts venues.

Lacking a permanent collection of its own, and obliged to charge for temporary exhibitions, the Hayward has always had to struggle to win friends.

Forty years on, however, London has learned to love what has become a central part of the ever more vibrant Southbank Centre.