FTSE Gilt Indices
The “FTSE Group” (FTSE) is an independent company whose business is the creation and management of indices. Other index providers include iBoxx and some investment banks. Investors use indices for investment analysis, performance measurement, asset allocation and for creating index tracking funds.
FTSE publishes a number of gilt indices and ahead of changes in the composition of its indices it publishes index change notices. The main changes relate to increases in the size of a gilt e.g. following an auction, the deletion of a gilt as it matures, or the movement of a gilt to a new (shorter) maturity index as it ages. The second link above provides access to the FTSE technical notices relevant to the gilt market.