7) Can I use e-cigarettes onboard my TUI flights?

You're not allowed to use electronic cigarettes, or any other portable smoking devices, on the plane - this includes charging. They can be carried on as hand luggage only. You're not permitted to carry e-cigarettes or their spare batteries within your hold luggage.

Flights to Thailand
Please note that e-cigarettes are illegal in Thailand and may be confiscated at the airport.