On the outbound/inbound, LGW/KUL A380/B777 the message feature was definitely not there. Not bothered as we don't use it.
The A380 toilet on the left after the curtain is a F toilet, in front of 7K. FAs let J pax use it. If the showers are in use, they lock it just in case a F pax needs it. The 7A and 7K are my favourites because of the private feel.
Let me explain my frustration on the inbound A380. Mama in 6D, little sister in 6G, Fidgit in 8D, Papa in 8G. Annoyingly he routed via the F galley, flushed the open door toilet, came through the curtain pinched his sleeping sister in 6G and nestled up to his Papa in 8G. His tos and fros accompanied by an open door toilet woosh was not funny. One or two fellow pax. did complain but but but.....My Jack Daniel journeys did compensate somewhat.