It's bunk!

it's bunk if Lewis tries to deny that he was writing about Christianity. Take the following for example. A little girl from the United States asked Lewis what Aslan's name is in this world. His response was the following:

As to Aslan's other name, well I want you to guess. Has there never been anyone in this world who (1.) Arrived at the same time as Father Christmas. (2.) Said he was the son of the great Emperor. (3.) gave himself up for someone else's fault to be jeered at and killed by wicked people. (4.) Came to life again. (5.) Is sometimes spoken of as a Lamb.... Don't you really know His name in this world. Think it over and let me know your answer!

OF course he's talking about Christ and for him to deny that he didn't consciously write it about Christ is a bunch of bull!