I have holders numbers about 20 of them from being given them as a baby and other birthdays. So when I open an account online my name will trigger the system and I will be told how much I can pay in - minus my current holding ?. I have no clue as to how much my current bonds cost - are worth.
In that case it looks like you will have to write to nsandi first to get them all consolidated under one holder's number. Some info on MSE below and there are lots more threads etc. if you Google:
I think each individual bond is worth £1.
Premium Bonds: two holders numbers
I opened an NS&I account last year and then sold my income bonds to take out some Premium Bonds.
