Used to do....1330-2130....followed by 0700-1330 plus 2130-0700 sleep, day off, repeat. Civil ATC [PATCRU/Manch TWR]
RAF...0700-1300 then 1630-2200 followed by 1300-1630+2200-0700, sleep, repeat, sleep + 3days off....unless sickness, then 2on1off ad infinitum... Now 2-0700-1400,2-1400-2200, 2200-0700 sleep+3 off
watp,iktch