> We live in the US. I am British and my wife is American. I know our son is
> naturally American, as he was born in America to a US mother . . .
Actually, your wife's citizenship is irrelevant to this issue. Under US law, =any=
child born in the US is automatically a US citizen, no matter what the citizenship or
immigration status of the parents. The one and only exception to this is if the
parents are foreign diplomats.
> . . . but is he also a British citizen somehow ?
I believe so. As long as you were born or naturalized in the UK, my understanding is
that your children get automatic British citizenship. There are some more complicated
rules which would apply if you are a citizen of the UK because you were born outside
the UK to a British parent.
> would it be sensible for me to somehow get him a UK passport etc ?
Sure. Contact a British consulate or embassy.
> What are the pros and cons ? Could he lose his US citizenship if I make him a
> dual national of the UK and US ?
The biggest advantage I can think of is that, when your son grows up, he will have
greater flexibility in where he wants to live or work. As a citizen of the UK, he
will be able to live/work, not only in the UK, but anywhere in the EU.
Nothing you do can nullify your son's US citizenship. Under US law, it doesn't matter
if he is also a citizen of the UK; he can keep both citizenships for life. (It is
widely believed by Americans that a "born dual" citizen must choose a single
citizenship when he/she grows up, but they're all wrong; there isn't anything in
current US law to require any such choice.)
Note that, according to US law, your son will need to have a US pass- port if he
travels abroad. This may mean he'll need two passports, one from each country. Also,
he'll have to file a US federal income tax return every year -- though there are
provisions in the US tax law which will probably mean he won't have to pay any tax to
Uncle Sam if he's living and working full-time abroad. (The US is one of only a
handful of countries which claims a potential right to tax foreign-source income of
non-resident citizens. The UK, on the other hand, taxes only people who live, and/or
have income from, the UK.)
Rich Wales firstname.lastname@example.org http://www.webcom.com/richw/dualcit/
*DISCLAIMER: I am not a lawyer, professional immigration consultant,
or consular officer. My comments are for discussion purposes only and
are not intended to be relied upon as legal or professional advice.