Boarded two hours late because we waited for one passenger, then had to wait further to take the luggage of one passenger off the plane. Waited two hours after the plane took off for meal service to start (it was a late flight), and there was barely any opportunity to sleep between the constant overhead messages (including several ads for the duty free - some when people were trying to sleep.) cabin crew was very nice, but the lights mostly stayed on during the overnight flight and they were talking very loudly behind the curtain. Made it impossible to actually sleep.