If people need to be found for the purpose of reading of the will and its proceeds, there are several ways in which this is carried out. Quite often when somebody dies, who hasn't made out a will, (and it is believed that they do not have any surviving relatives/next of kin), before the person's estate goes to the crown, the solicitors of that person will do searches, and if nothing is found then they will hire private investigators. They leave no stone unturned, and it is very rare that they do not find someone related, however remote in the bloodline.
So, even if you had married, divorced, married again, moved and moved yet again, it is most unlikely that the solicitors would not have 'found' you and been in contact.