If you're flying to Thailand from the UK, you'll almost certainly land in Bangkok. Emirates, Qatar Airlines, Cathay Pacific and Singapore Airlines all operate frequent flights to Suvarnabhumi Airport (commonly known as Bangkok International) which lies about 30km west of the city centre.
If you're flying into Bangkok from elsewhere in Asia, you're likely to arrive in Don Mueng International, which is around 25km north of Bangkok's centre. It's an easy bus journey or cab ride into the city centre from both airports, and all sign posts offer directions in English.
Another way of getting to Bangkok is aboard a bus; if you're travelling overland from somewhere like Chaing Mai, or Siem Reap in Cambodia, there are plenty of cheap and comforable overnight coach options.
Bangkok Day Tours & Mini Adventures
The busiest months in terms of tourism in Bangkok are between December and April, when the climate is driest and the sun nearly always shines. British summertime is actually Bangkok's rainy season, so expect high humidity and short, sharp afternoon storms from late May through until October. Bangkok is rainiest in September.
Despite its business (it's estimated Bangkok is now home to over 10 million people), the city is relatively safe, and the biggest danger is traffic. Like in any city, you should stay alert, keep expensive belongings such as phones and jewellery out of public sight, and don’t do anything to attract unnecessary attention to yourself.
It's also a good idea to read up on Bangkok's most common scams before you venture out to explore: ignore drivers who tell you the attractions you want to visit are closed for prayer so they'll take you somewhere else (usually on a tour of shops they get commission for bringing footfall to), and always ask for your taxi or tuktuk on the meter.