An infrequent easterly wind, so all African and South American flights from Heathrow take off to the East and screech over our house at 5000ft.
Only these destinations take a sharp right hand turn after climbing out of Heathrow.
I can now guess which flights they are by the noise, as I now know which routes have the older planes with older nosier engines.
The older 777-200LR at 10pm to Rio makes a right racket as does the 777-300ER Latam to Sao Paolo.
We don’t get any noise on the usually westerly take off direction, which is over 95% of the time.
BA251 is two hours late and has missed 11.30pm curfew, taking off near midnight. No point me trying to sleep until this one screeches past as bedroom windows are open
Last flight out is usually before 11pm, so this one fully laden is going to wake a few people up.