The official language spoken in Thailand is Thai, otherwise known as Siamese, but you'll hear plenty of locals speaking fluent English.
Thai Baht (THB).
100 Thai Baht is approximately £2.30
UTC +07:00, making Bangkok 7 hours ahead of London.
A bottle of local Thai beer from a café or shop can cost as little as 40THB (around £1). A Sangsom and soda bucket can cost between 124THB (about £3) to 300THB (about £7) depending on where you find it, and are so strong they're best shared!
Thai street food can cost as little as 50THB (just over £1) and can be every bit as delicious, if not better, than in some restaurants. For a sit-down meal somewhere midrange, expect to pay between 150THB (£3.50) to 300TBH (£7).
A basic dorm bed in Bangkok can coast you as little as 125THB (about £3); expect to pay double on the Southern Islands such as Koh Phangan, especially if you're staying there over Full Moon.
For a mid-range room for two people in a hotel or guesthouse, you'll pay upwards of £10. Fancier hotels can cost around £25-40. Book in advance with STA Travel to bag the cheapest rates; we always have awesome Thailand accomodation on offer!
Taxis cost around 5TBH (15p) per kilometre, after the initial surcharge. A 10km ride should cost you under 150THB (£3.50), and from the airport to Khao San Road, expect to pay between 350-530THB (£8-12.50). Always ask for the meter to switched on; it's fun to haggle a price before you start the journey, and you'll get a better price.
A 10 hour bus journey from Bangkok to Chiang Mai on a pretty comfy sleeper coach costs around 500-600THB (or anywhere between £10-15). A 12-15 hour bus journey from Bangkok to Phuket costs 1000THB (just over £20). Boat trips between islands cost around 500THB (£10).