Complex sentence: Designed in 1971 as the centrepiece of a proposed radical redevelopment for a new Brixton on raised walkways over a motorway, the recreation centre was the only building realised when the rest of the scheme was abandoned in 1973.
Split into simpler sentences: Designed in 1971 as the centrepiece of a proposed radical redevelopment for a new Brixton on raised walkways over a motorway. The recreation centre was the only building realized when the rest of the scheme was abandoned in 1973.