Air Commodore Roddy Dennis, the commander of the UK air component:
"We're targetting that hardcore element that's left.
"What we see ourselves now is in that final stage of removing those hardened fighters that have sought solace somewhere down in the southern eastern part of Syria and we're having really good success at closing that out.
"I'm very confident that we will see the ultimate demise of Daesh in the southeastern part of Syria, but it will take some time to do that."
RAF Tornado GR4: A Key Component
One of the RAF's aircraft with a key role in the Shader mission is the outgoing Tornado GR4.
Involved from the very start of the operation, they have gathered intelligence and launched hundreds of airstrikes against IS.
Squadron Leader Colin Bolstrom is a Tornado weapons systems operator who has completed several Shader tours.
He says he has seen the fight against IS evolve over time: "The range of missions the Tornado's completed over the years has changed.
"When I first arrived in Shader we flew aid from this hangar over to Mount Sinjar and supporting refugees.
"We're now supporting the defeat of Daesh, dropping weapons and providing support.
"The most intensive period is when we're targeting, especially over Mosul."