The 61-year-old's fall from grace was swift after he was summoned to a meeting with new FA chairman Greg Clarke and chief executive Martin Glenn to discuss overnight revelations from an undercover sting set up by Britain's Daily Telegraph newspaper.
Amid a series of injudicious comments, the issue that seems likely to have persuaded Clarke to use his authority was Allardyce's comments about how FA and FIFA rules banning transfers involving third-party ownership could be circumnavigated.