Mine was about 4 wks but it will depend on how many are received. This time of year may be worse cos it's just been the closing date for resiginations for this term. But not as busy as summer.
Usually a couple of weeks, but there is a big initiative going on at the moment that means that ba lot more are being put through, resulting in a slow down of theprocess.
But also I've found when processing them it really does depend on how many addresses you've put down, if you've ever been abroad etc etc. Some haven't come back after 2 months yet.
It's like the more investigating they have to do, the longer it takes. Logically.