Gibraltar is a self-governing part of the United Kingdom. With an area of only 5.8 sq km and 12km of coastline, Gibralter occupies a limestone outcrop on the southern tip of the Iberian peninsula, bordering Spain. Gibraltar town is the capital, with a time difference of 1 hour ahead of GMT. The currency is the Gibraltar pound, and economic activity includes tourism, petroleum re-exports and manufacturing. The population of approximately 28,000 people comprises an ethnic mix of Spanish, Italian, English, Maltese, Portuguese, German and North Africans. The primary languages are English and Spanish, and the predominant religion is Christianity.