How do I demonstrate I am a British Citizen?

[VinGam]

Hi all,

Is there any other document other than the passport I can show in order to demonstrate I am British Citizen?

me and my wife are Italians, last year we had a daughter and we managed to get her British nationality due the fact the baby was born here and me and my wife exercised the EC Treaty rights for the last 5 years.
She has got the Passport that can show she's a British citizen.
I am wondering if there is any other document I can get in order to demonstrate she a British Citizen.

Thanks in advance

[secret.simon]

British passport should be sufficient.

You can also apply for a letter confirming British nationality status, but that has the same status as a British passport (i.e. they are only prima facie proof of citizenship, not conclusive proof) when it comes to proving British citizenship.

There is, to the best of my knowledge, no conclusive proof of British citizenship for a person in your child's situation.

[VinGam]

Thanks secret.simon