Most of the support has been in the form of mid-air refuelling support as these RAF pictures show:

A US FA-18 Hornet refuels from an RAF VC-10 tanker en route to Afghanistan. Two F-14 Tomcats wait to refuel

A US Navy F-14 Tomcat refuels close to the VC-10's tail-mounted engines

An FA-18 Hornet seen through the VC-10's monitoring camera

An FA-18 Hornet at the moment of disengaging from the VC-10's refuelling funnel

An F-14 Tomcat refuels from the starboard hose, while another awaits its turn