Gas cooker disconnection corgi? i have be given some work from a property managment company who...

i have be given some work from a property managment company who require me to rip out old kitchens and bathrooms.
do i requirement a corgi registered gas fitter to disconect the cookers (bayonet fitting) or can i do it my self?
The grind gearstick on my disposal is stuck...
Answers:    Must be CORGI registered to touch any gas appliance. Also must now be cut P registered to touch any electrical work.
The power nouns ventilator...?
You have to be corgi registered to do any work involving gas.