In summary you should consider following for electrician
Dimmer switches, wire for surround system in sitting room, spotlights, plug on chimney breast for electric fire, switch near bed to switch off main light, switch for ignition of gas hob, spotlights, wire for electric showers, wire for mirror lights over sinks, wire for lights over kitchen worktop, wire for lights in kitchen presses, extra tv and phone sockets, doorbell, smoke alarms, lamps on wall outside front door, strong floodlight for back garden, light in attic, plug in attic, position of cooker switch, position of dishwasher plug, washing machine & tumble dryer plug. cable for outside lights in garden front and rear, wall lights either side of wireplace, other wall lights, additional plugs in all rooms, emergency light, broadband.
For plumber, position of washing machine & dishwasher, additional plumbing if american fridge freezer, outside tap, additional plumbing if putting vanity unit in bathroom, size of shower tray, type standard ware, position radiatiors etc, electric shower, power shower etc