the actual bayonet fitting is a user control and you can unplug and replug in to your hearts content, but a corgi is required to check the connection at the other end, the gas tightness of the complete installation and also the commissioning of the new appliance.
It is not clear what the original posting is actually asking.
It could be interpreted as taking the hose off an old cooker and fitting onto a new one. This has to be done by a CORGI registered person who might be reluctant to reuse an old hose.
If the new cooker just happenned to come already fitted with a new bayonet hose then although its not technically correct it would usually be assumed to be a DIY job to plug it into the socket.
The problem is that most DIY people do not have the equipment or knowledge to know how to test for gas leakage. Therefore its better to be safe and let a professional deal with it.
I went to a gas leak in a kitchen caused by a finger tight screwed gas fitting which was part of a kitchen installation by the girls father, a chinese waiter! ( 10 mb in one minute! )
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