On our recent Gas Appliances and Regulations course we had an enquiry from one of our delegates about the regulations on re-installing a cooker as part of a kitchen refurbishment in a multi-dwelling building.
The question was: If the previously used (in the same ownership) gas cooker is re-installed to the original / revised position, is there a requirement to have flame supervision on all burners?
We have checked with Gas Safe Register, and their answer was no.
The requirement only applies to the installation of brand new appliances. It does not apply to reinstalling existing, or even second hand appliances.
Detailed guidance is in the Commentary on Amendments to IGE/G/5 GAS IN FLATS AND OTHER MULTI-DWELLING BUILDINGS issued by the Institution of Gas Engineers and Managers.
Here is the web link: