Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This one, regarding a lighting circuit extension and its protection, is answered by the ECA:

Answer: Yes - the new switch drops require the additional RCD protection.
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