This visa route is for people holding Limited leave either as:
HM Forces member on discharge or discharged, or
partner and child of a British HM Forces sponsor or
Commonwealth HM Forces sponsor under Appendix Armed Forces, or
partner and child of a British HM forces sponsor applying under transitional arrangements under Part 8 of the Immigration Rules, or
partner and child of a foreign or Commonwealth HM forces sponsor applying under transitional arrangements under Part 7 of the Immigration Rules