So post your primary sources then, don't just ask me to take your word for it. Please excerpt relavent details etc. I don't know you, and your say-so is not enough.
I usually prefer not to get my history from the internet, but this site seems to be fairly reliable.
http://www.winstonchurchill.org/i4a/pages/index.cfm?pageid=268
By the way, this isn't rocket science. Ask someone who has actually studied the relevant fields (WWII, British history, cryptography) and they will tell you that this is a myth. ALL the primary sources contradict your assertion that Churchill knew that Coventry was going to be the target of bombing.
There were certainly clues that were evident using hindsight, but the fact remains that the intelligence at Churchill's disposal at the time pointed to central London being the most likely target. (which he also did not evacuate, by the way)