The carriage of an ELT was required if flying
(bb)at a distance of more than 10 minutes flying time at normal cruising speed away from land suitable for making an emergency landing
Microlights were granted an exception to use PLBs, instead of ELTs, but now all non-commercial flights are exempt.
http://www.caa.co.uk/docs/33/ORS4_902.pdf
Microlights are not required to carry an ELT or PLB in France either.
https://www.sia.aviation-civile.gouv...2008_10_EN.pdf