It was only a campaign by some serving, reservists and ex-serving and some robust questioning in the Upper House by Air Marshal Lord Garden that got this subject onto the agenda.
The system was changed from one-time registration to annual registration.
Service personnel were not informed properly, and were never consulted. Have you ever managed to get hold of a DCI? They normally sit in someone's in tray!
Leaflets were distributed - 1 leaflet for 3 personnel in all 3 services. Compare this to 56,000 new AP 3003 RAF History books at who knows what expense - 1.37 books for each member of the downsized RAF, so a lucky few will have a spare to flog on EBay! Mind you, this is a slight improvement on the 1 shared between 10 personnel AFPS consultation leaflets!
The success of the leaflet distribution is uncertain. Army formations have not received them and a certain place near Walter's Ash apparently has not either. They may have gone out the door at the last minute.
Have special measures been introduced for those OOA to participate in the electoral process? I would doubt it.
It seems that it is OK to implement regime change abroad but not to take part in it in the UK. Perhaps this is because HMG is aware that those in uniform feel slightly bitter at recent decisions regarding the Armed Forces....