http://www.bbc.com/news/uk-30338659
Some excerpts:
Raids against Islamic State are being conducted from RAF Akrotiri in Cyprus "with broken jets and tired and fed-up people", BBC Newsnight has been told.
In a letter, a serviceman said the base was being neglected, morale was poor and ground crews had taken to eating humanitarian rations meant for Iraqis.
Newsnight also understands only 16 of 102 RAF Tornado jets still meet full combat standards.
Shortly after operations began against Islamic State in September, the detachment of Tornado strike aircraft was increased from six to eight.
Newsnight understands this increase was necessary in order to ensure there were always two aircraft available for bombing missions.
Only 16 of the RAF's 102 Tornado GR4s meet "diamond fleet" standard, which is the aircraft fitted with all of the equipment necessary for combat.
Many of the remainder are now mothballed.
Half of these top specification jets are now in Akrotiri, but Newsnight has learned that due to their age and long use, the battle to keep them airworthy requires long hours of work by ground crews, particularly on the engines.
On many days, just two or three of the Tornadoes are available for missions over Iraq.
T shirts worn by II Squadron members at Akrotiri bore the legend "Op Till We Drop".
Defence sources argued this unofficial motto was more banter than anything else.
The unit has now returned to Britain for Christmas and the MoD said its members had been given an extra week's leave, in recognition of their recent efforts.