Flight Heathrow Airport departs from London Heathrow Airport at 21:35 and arrives at Taipei Taoyuan International Airport at 21:30.The flight has a short stop at Bangkok.
The flighttime is about 15h 55m. The distance travelled ("as the bird flies"): 13134 Km. So the average speed is roughly 825 Km.
There is an 8 hour time difference between London and Taipei