Price today about 475, highest price was 677 in the spring.
Unless you have been to Mars and back I am sure you are aware of Brexit.
This will obviously have an effect in the short term with the drop in the value of the pound against the Dollar (purchase of fuel and new aircraft) and the Euro (purchase of hotel rooms, transport, nave charges, airport and handling fees etc in Europe)
The price reduction in the value of shares is also nearer a third and not a half.