RAF Tornados will continue to carry out air strikes against so-called Islamic State until March 2017, the Defence Secretary has announced.
Michael Fallon, speaking on a trip to Iraq, said the strikes had helped Iraqi forces push militants out of key towns.
"We want to ensure we maintain this crucial operational tempo and so we will extend the lifetime of Number 12 Squadron for a further year to March 2017," he said.
The squadron of Tornado GR4 fighter bombers was originally due to be disbanded last March and replaced with a squadron of Typhoon air defence fighters.
But following the launch of airstrikes against the terror group last September, David Cameron announced they would carry on until March 2016 so they could continue in their specialist ground-attack role.
The second extension for the fighter bombers would ensure the RAF retained "the essential precision firepower, intelligence and surveillance" capabilities needed for operations against IS, Mr Fallon said.
The Tornado GR4 is reaching the end of its planned service life, and the all-weather attack and reconnaissance aircraft has borne the brunt of many of the RAF's major operations since 1990.
In these strikes, 86 Brimstone missiles and 214 Paveway IV bombs have been deployed, the MoD says.