I have been corrected in my attribution of Cascades to Piers Gough by Roger Zogolovitch who was the Z in CZWG (Piers was the G).   Roger says that the key person in the design was Rex Wilkinson (the W), who based the design on apartment blocks in Miami – hence its jazzy, seaside air.   I seem to remember that the Prince of Wales was very rude about it (it appeared on the cover of A Vision of Britain), but it now looks attractively racy and re-established the idea of apartment living in tower blocks which had been discredited by social housing:-