If you are flying from the UK to the channel Islands it is ok.
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).
Yes, you need a valid passport to travel to the Cayman Islands.
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.
If you need a passport there, the baby will also need a passport. Maybe there is the possibility to get your baby written into your passport.
Yes, you need a valid passport to travel to the Cayman Islands.
Yes, you need a valid passport to travel to the Cayman Islands.
Yes, you need a valid passport to travel to the Cayman Islands.
for short term no but you do need a passport for short term no but you do need a passport
Yes, you need a valid passport to travel to the Virgin Islands, as they are a U.S. territory.