Page 145 gives the procedure for what it describes as "Residential Charging" and it does seem to contradict the above:
Residential Charging
Your vehicle will have been supplied with a residential
charging device. This device can be plugged into a standard
household 3 pin socket.
During the charging operation the vehicle power system
must be OFF. Carry out the following procedure to charge
the car using the charger supplied with the vehicle:
1 Ensure vehicle power system is OFF and all doors are
closed.
2 Open the charging port door, remove the waterproof
plug cover from the 7 pin charging plug connector.
Ensure the surroundings are clean, dry and free from
debris.
3 Connect the 7 pin charging plug to the socket on the
vehicle.
4 Connect the charging device 3 pin plug to the domestic
electricity supply. Lock the vehicle.
5 On completion of the charge unlock the vehicle,
disconnect the charging cable from the vehicle, and
then the domestic plug.
6 Ensure the charge socket is free from debris, fit the
waterproof plug cover. Close the charging point door.
Note: If at any time during the charging process you
should want to check the state of charge, please switch
the vehicle power system to the ON position. the high
voltage battery state of charge will be displayed in the
message centre in the instrument pack.
Note: If the vehicle is unlocked during the charging
process, charging will be suspended. Charging
will resume after 1 minute. If charging does not
automatically resume, it may be necessary to remove
and refit the charger cable.
I did my first charge following this procedure this morning and it worked fine. I didn't find the final note correct as unlocking the car didn't seem to suspend the charge and it wasn't necessary to switch the power system on in order to see charging information as it appeared automatically and on each subsequent occasion the door was opened.