WAFU actually stands for Weapons and Fuel Users.
People who get chopped at Valley or Harrier OCU normally go to Shawbury, unless they decide to resign as some do.
Unlikley to get a transfer these days, as the Crabs don't have enough fast jet slots for their own people. Hence lots of Crabs with wings pitching up at Shawbury these days.
Regards,
Jucky