You’re welcome. If you view the census image, you will notice that a number of t’s were not crossed. If one would add the cross marks, Lillie almost becomes Lettie. (I don’t have the census image open right now, perhaps it could actually be Le rather than Li?)
Also, according to the internet, the 1901 census was taken 31 March 1901. According to his father’s WWI pension record, little Alfred was born 29 May 1900. In the 1901 census, Alfred was recorded as being 10 months old. So, the age fits. No guarantee that it is the correct family, though.