HK dollar. Hong Kong is one of the most expensive cities in the world and easily more expensive than other destinations in the region. Accommodation and nightlife are the primary costs, whilst transport is relatively cheap.
ATMs are located all over town and major credit cards are accepted in most restaurants and large stores. Rates at bureaus de change are very variable so it's worth shopping around. The airport and the large hotels have the worst exchange rates in town. One of the best bets is Chequepoint - a chain with stores in Centre on Hong Kong Island and Tsim Sha Tsui in Kowloon.
The official languages of Hong Kong are Cantonese and English but Cantonese is the common mother tongue. The highest proportion of spoken English is to be found around Hong Kong Island and on the south side of Kowloom. The working classes and those not involved in the tourist trade generally communicate in Cantonese and Mandarin so English in the Outlying Islands and New Territories can be extremely limited.
+852 for Hong Kong
Visas are not required by citizens of the United Kingdom for entry into Hong Kong.