 Hanwell became a model for future hospitals and was copied and modified by the designers of countless other asylums across England and Wales (for example Horton, Colney Hatch, Claybury, or Springfield).The main alternative design being the villa plan (for example Chalfont or Shenley).The central tower was adorned with a monumental clock procured from John Moore & Sons of 38–9 Clerkenwell Close, London.