This phrase neatly suggests the overlap of meanings abundant in any city. Containing at least six distinct connotations, 'press for change' is a programme for action and a process all in one: 'press' and 'change' slip meanings and multiply variations on a theme. We consider the process of meaning slippage and overlap to be the "crux of creativity," (cf Douglas Hofstatder). Likewise, the 'active brief' of an urban condition should be as multifarious as possible, at one level an ambiguous stage for daily routine, and at another level a highly specific accommodation for a sequence of objects and actions; for example, the opposite of providing a sill or step and then neutralizing its implied brief with anti-sitting metal spikes. London is a laboratory for improbable urban and architectural experiments, an experimenter's plaything with enormous potential for alternative scenarios. The studio concentrated on the Borough of Southwark, one of London's hottest development zones.