Lead Hat are moving to new offices Adrian Marshall, 13/09/2000 Lead Hat has acquired a lease on new offices at 28-29 Great Sutton Street, Clerkenwell, London EC1. The new offices, which are currently under refurbishment, will allow Lead Hat to accommodate the staff required to service the company's expanding client list. Nearest tubes are Farringdon (including Thameslink) and Barbican. Various bus routes also pass the area.