The exact types of identification needed to enter Holland will depend on where the traveler's home country is. If you are a British citizen looking to travel to Holland you will need to make sure you bring passport with you.
From where?
Nigerians are required to have a visa to travel to Britain.
A Passport.
At least a passport.
There are bus coaches to bring people from Ireland to Britain. You have to travel by ferry, as Ireland is an island, and as it is an international journey, you should bring a passport. There is less checking of documents on ferries, but it advisable to bring a passport, especially if you are not an Irish or British citizen. You may even need a visa to visit Britain.
Usually, when you travel locally, you need your valid identification card. An example would be your drivers license. You might also need your passport if you travel by air.
A valid picture identification card.
Yes if you are to travel by air but if it is by sea of land, no need but you need a proof of identification and the passport is the best one you have for the child.
Yes, even children need passport to travel. Especially when it is international.
No. There is a common travel agreement between Ireland and Britain. You will not need a passport at any time when travelling across the sea between Britain and Ireland. Neither do you need one when travelling in Ireland, from the south of the country to the North. There is no border on the island. There is open travel between the islands/countries of Ireland and Britain. Google 'Common Travel Area Britain Ireland' .
You don't need identification unless you plan to use a special railcard which gives you discount on a fare.
technically none but if travelling by air the airlines demand a passport