Flight Heathrow Airport departs from London Heathrow Airport at 22:10 and arrives at Guangzhou Guangzhou Baiyun International Airport at 16:55.
The flighttime is about 11h 45m. The distance travelled ("as the bird flies"): 12329 Km. So the average speed is roughly 1049 Km.
There is an 7 hour time difference between London and Guangzhou