Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This one, regarding CO detectors and the wiring of them to the 17th Edition, is answered by the ECA:

Answer: We recommend wiring from the local lighting circuit, with an integral battery backup.
To see many more Q & A in Voltimum UK's Experts Area, please click on the link:
www.voltimum.co.uk/consult.php?universe=consult.index.questions