After some advice, what would be better:
having 2 tables in a database called; 'Users' and another called 'PersonalDetails'.
In Users there will be an ID, username, password
In Personal Details there will be ID, usersID, firstname, surname, DoB, address
and link the 2 tables using the users.ID with the personalDetails.usersID
Contain all them details in one table called 'Users' thus not having to link.
My initial thought were to keep details seperate but really there will be only one personalDetails record per users record so is there any point in seperating the two pieces of info?