In a quiet, terraced suburban street in Enfield, an unremarkable North London suburb sandwiched between the capital’s two main orbital roads, Flat 21a contains the current headquarters of CAS Hewlett, the accountancy firm that for almost the past decade has audited the books of Stanford International Bank (SIB) of Antigua.

Until January, CAS Hewlett was run from Antigua by Charlesworth “Shelly” Hewlett. Mr Hewlett died last month, however, and control of his accountancy business passed to his daughter, who lives in Enfield.