Approaching London on the 1129 from Swansea, I'm in coach H, and the next functioning toilet is in K. None working aft of H either. There's also a non-functional external door on H.
On the plus side the driver's clearly in a good mood as we've had some excellent runs before being caught by signals to get back to the timetable! Just hate the seats...
The electronic reservation system is fully functional however!