I think you are asking a question that is unanswerable. First of all you have to define the word "Christian" as the British army defined it in 2004. The British army would have had to have a questionnaire that asked every soldier if he was a Christian. I do not know if this is allowed any more. All of the questions would have had to been turned in and counted.
None the British army is an army, not an air force.
the British army helps protect Britian against many reasons
The same number as in peacetime.
There were 2 divisions in the land army in January 1938.
About 150
there are 999,999,999 million men in the British army
123
There is no English army, however the British army currently has112,000 personal (regular army) and 34,000 (territorial army).
3300
two hundred and fifty six
The latest figures say 147,000.
The British were better trained in their army