PaulC,
Even though I may come from the other side of the world and use a different wiring method.
I have this to say, give the people more socket-outlets than what they need.
This will later mean that they won't start using shonky devices like multi-way power boards to effect more outlets!.
It's best to protect your installation from problems at the start and I would recommend a minimum of 4 double sockets, two of which should be near the head of the bed, for clock/radio's and electric blankets. [Linked Image]