London is world's most expensive city for a night out

The capital tops the list in a cost comparison of an evening out for two people in key tourist cities around the world.

Hanoi in Vietnam offers the most affordable night out for British travellers, with a total cost of Stg89.93 (£90).

At more than triple the cost of Hanoi, London topped the list as most expensive with a cost of Stg330.45 (£330).

The TripAdvisor TripIndex is tracked against the British pound and is based on the combined costs for two people of one night in a four-star hotel, cocktails, a two-course dinner with a bottle of wine and taxi fares.

"TripIndex helps travellers to see where their pound goes the furthest," TripAdvisor spokeswoman Emma Shaw said.

"The list shows that many Asian cities, along with some European cities - like Warsaw and Sofia - are very affordable once you're on the ground.

"Some cities traditionally considered expensive - like London, Paris and New York - actually cost three times more than the cheaper cities in the list for an evening out."

Hotel costs were the pivotal factor in determining the cheapest and most expensive cities on TripIndex.

The cheapest average hotel room goes to Bangkok at Stg51.68 (£50 per night, while the most expensive goes to London, at Stg230.39 (£230) per night.

South-East Asia featured heavily in the 10 cheapest destinations, claiming four cities in total, including the cheapest city for Brits, Hanoi.

In addition, Bangkok, Kuala Lumpur and Jakarta ranked third, fifth and ninth.

Europe dominated the most expensive list with seven of the top 10 destinations, with London taking the top spot. Oslo, Zurich, Paris, Stockholm, Moscow and Copenhagen took second, third, fourth, fifth, seventh and eighth places respectively.