Kossoff has always been obsessively concerned with particular sites in the area of London where he lives. He began a series of paintings of the Children's Swimming Baths at Kilburn in 1967, with the pool crowded with families swimming and diving. The bath provides a simple perspective framework within which the figures are shown as a mass of intersecting marks. The overall effect is one of frenetic movement, light and noise.

The painting evolved from numerous charcoal drawings done on site at different times of the day. The figures are reduced to two or three strokes of thick wet paint, built up in layers to create a deeply textured surface.