Accessories randomly comes on without key

Accessories randomly comes on without key radio flatten battery. Have proven not radio, removed radio fuse and power to accessories cigarette lighter still on, also removed ignition switch cover and unplugged ignition switch accessories completely still accessories on.

This is intermittent, can park car having radio on at "traffic loud" switch off car and radio off as normal, later accessories comes on with radio, GPS phone charger etc. Waking people up if at night or can flatten battery if not noticed.
Appreciate any help,

Cheers, John and Joy