Local quiz

[Left peg]

Supplanted by the Treasury Board of 1714 ?

At least one word of the answer must begin with an E.

[quizzled]

In 1714 the single office of Lord High Treasurer was replaced by the Treasury Board. The last Lord High bloke was Charles Talbot, Duke of Shrewsbury.

No 'E's involved so far.

I suppose you could say the Exchequer was supplanted by the Treasury Board, in terms of it's authority, but it still existed until 1834ish.
This is probably more information than you want! Hope it helps.

[jaywhybee]

Could it be Customs & Excise?

[Left peg]

Thankyou both for your suggestions. It's a tricky one because nothing seems clear cut.