Across:
   8. Some signatories responsible for 18 of 10 in '99 (4)
   9. Broken sound lever still not fixed (10)
  10. Avail one promotion, so fellow returns to country (10)
  11. see 2 down
  12. Takings in foreign coins ... fat coins! (13)
  14. Used when destruction intended is miles off (7)
  16. Cherishing hope, a newcomer can exploit such openings  (7)
  19. With 4 and "I do", Clinton lay in ruins (13)
  23. Part of warship where aces may be found (4)
  24. see 2 down
  25. Crimes organised by workers, soldiers and troublemakers (10)
  26. Trajectories of flying cars? (4)
Down:
   1. Where impromptu thug 10 banish ends up (5)
   2,24ac,11ac. Rebel group's "King" destroyed... so, royal overambition? (6 10 4)
   3. I lug fuel around, being sneaky (8)
   4. Catch poor wandering around, ultimately homeless after six (7)
   5. Capital's name recently swept aside in Belfast anarchy (6)
   6. Immoral ban I anxiously break, like many 2 residents (8)
   7. Individuals out to determine if trouble brewed (9)
  13. Some civil unrest as former president extradited from 10 (9)
  15. Wing man with a pass to the centre? (8)
  17. It sits on a seat and reads the letters (8)
  18. Gang came back with container, good for destroying with explosives (7)
  20. You might be banking on meeting this informant (6)
  21,22. Allowed 2001 computer for religious group for 18 etc (6 5)