If you are flying from the UK to the channel Islands it is ok.
No
Any valid passport will suffice.
No, both the UK and the Channel Islands are in the common travel area meaning that immigration control is not used.
yes you do in order to travel you must have a passport
There is no such thing as an English citizen. If you were born in England you are a British citizen (as described in your passport).
No, Sark as one of the Channel Islands is part of the common travel area which includes the UK, Ireland, IOM and the Channel Islands but Sark is not part of the EU.
well that depends. If a baby is under 18 months then it will not need a passport. I got my first passport when I was 5. Babies usually get discounts at the airport. Channel islands or Canada, a baby does not need a passport if it is under 18 months.
Probably, if has photographic identification. Check with the plane or ferry operator.
In a word "no". For international travel these days, a cancelled passport, while valid for identification, is no longer valid for overseas (including for Americans to Canada, Mexico, non-US possession islands in the Caribean and Bermuda).
If you are looking to travel from cities only inside the country of the US then just have valid identification cards with you like your SSS ID. However, if it is an overseas travel or travelling abroad, then a passport is needed.
CI is the abbreviation for the Channel Islands.
These are known as the Channel Islands.