Total War
Jane,
The United Kingdom, Commonwealth nations and other allies were fighting in Europe (on multiple fronts), providing support to the Russians, fighting in Africa, The Middle East, Asia, Australasia. I have probably forgotten some theatre of operations.
WW II was a Total War. This means the destruction of all assets. It also means that there aren't really any civilians as all are assets are mobilised with the aim of winning the war. All sides at the time understood this.
For those interested in why Bomber Command used some of the tactics that they did might I suggest a bit of reading up on the Operational Research department.