Webb England

WEBB – The Webb family I have been researching is rather confusing. It begins with William James Webb who has listed his year of birth as 1851 and place of birth as London, England on the 1891 census, but then in 1901, he has listed his year of birth as 1853 and the place as Turnbridge, Kent. However, I do know that he married Mary Jane Coggins (Coggings) and they had three children: Michael, Florence & Eliza.
I would like to find out what happened to these three children as well as unravel the mystery behind William and his birth.