Dear client,
If one of the co-owners dies, his share in the property does not pass to the other co-owners but to the person named in the will of the deceased. Like in case of joint tenancy, on death of one co-owner, the share of ownership automatically passes on to the surviving co-owner.
Since both the sons will receive his property share, they can visit the land registry office to get the name changed: Once the name is legally changed the owner of the land should visit the land registry office and submit all the proofs related to the new name change with a nominal fee to get his or her name updated in the land records.
Thank you.