Saint Helena, Ascension and Tristan da Cunha

This is not a country but an administrative structure of the Secretary of State for Foreign and Commonwealth Affairs of the UK. It was created on 1 September 2009, when a new constitution came into force giving the three islands equal status within this territory.
That means that all relevant information is provided and maintained in the equivalent sections of the three individual islands (separated by many hundreds of miles) rather than here.

English is the main language used on these islands.

(See the appropriate section of the article for the particular island you are interested in.)
Visitors require entry approval from the Administrator's office, requested in advance in writing. They must also have full medical insurance which will cover the expense of medical evacuation, if needed.
No visas are required.

By plane

• There is an airport is on Ascension island. It's a military facility but it's possible to purchase a seat on the military charter flights that usually operate twice a week from RAF Brize Norton (close to Oxford in the UK). Individual return tickets cost around £969 (Mar 2013), booked well in advance and preferably at least 28 days before the intended travel date, except in case of genuine emergency. All flight bookings need to be confirmed before the 14 day cut-off point. Group and students discounts are available. Contact Ascension Island Travel Agency, Tel: +247 6500, Fax: +247 6827
• Saint Helena has an airport (HLE) with flights every Saturday from Johannesburg, South Africa. See more in Saint Helena.

By boat

• The Royal Mail Ship Saint Helena retired from passenger service in February 2018.

See the appropriate section of the article for the particular island you are interested in.

Consult the appropriate section of the article for the particular island you are interested in.

The St Helena pound is at parity with the pound sterling which is accepted everywhere together with the South Africa rand and Euro. Pounds are subdivided into 100 pence.
The Tristan da Cunha archipelago is more than a couple of thousand kilometres away from St Helena, and St Helena pounds rarely make it that far, so people in Tristan da Cunha tend to use British coins and banknotes instead, when they are not bartering.
Costs are about 30% greater than the UK, except for vices.
Tipping is not expected but is greatly appreciated.

See the appropriate section of the article for the particular island you are interested in.

See the appropriate section of the article for the particular island you are interested in.

Tap water is safe to drink on all three islands.

See the appropriate section of the article for the particular island you are interested in.