Gilts where the dividends and principal repayments are fixed in nominal terms. This is as opposed to an index-linked gilt where the dividends and principal repayments are related to movements in the Retail Prices Index (RPI).
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Accrued interest
The interest earned on a gilt since the last dividend date. When buying a gilt, the buyer pays the accrued interest at the time of a transaction to the seller in addition to the clean price of the gilt
The United Kingdom Debt Management Office. It’s an executive agency responsible for managing the government’s debt and cash needs, primarily through issuing gilts and Treasury bills.