Possible Clues:

• Hear about a user involved in the Exchequer
• Hear about a ruse mishandled in government department
• A user wrongly entering tax for financial department
• Fund source
• Repository of government funds
• Department first headed by Hamilton
• Government department hear surrounding area in scheme overhauled
• Bank of river feeding into estuary resort
• Bank processes are rusty
• British government department managing finances