British residents who have been out of UK for 15 years were dis-enfranchised. This ruling has now been removed after much work and representation by various overseas groups including CPFG and they are now eligible, please refer to this document: House of Commons Document
Registration details can be found in this link: https://www.gov.uk/apply-postal-vote
And, courtesy of Cyprus Mail: https://cyprus-mail.com/2024/01/21/uk-citizens-re-enfranchised-at-last/
This applies only to our franchise in UK.
Regarding Voting in Cyprus: Voting for local MP/Municipal Council Members is currently forbidden under the Cyprus Constitution where, after BREXIT, British are classed as Third Country Nationals with no local franchise rights. CPFG has been fighting this and see:
Watch this space, we are busy!
MPG, CPFG/CRPG, Jan 2023