The obituary of Julia Ellen confirms that George Whitehead came to America before his wife and children, but we have not been able to determine the year he sailed to America or the name of the ship. His wife, Julia and her children Julia Elizabeth, George Morris and Charles John sailed to America in 1868 on the ship Colorado.
Note that the obituary of Julia Ellen states that the family came to Utah with the Homer Duncan Company, but this is incorrect, as there was no Homer Duncan company in 1868, nor did Homer make a trip back to Utah in 1868. Further research is needed to determine the name of the company with which the family traveled to Utah.
His name appears on the 1870 Utah census, but has been listed incorrectly as "Charles M. Whitehead."
He married in England in 1905, so may have remained there until his death.