Mine took 22 days for confirmation at the start of March, I’m sure much longer waits are probably normal now.
Basically their system is crap.
They seem to assign a random office for each application (instead of assigning equally or to the one with the lowest workload) so certain offices get overloaded with mail. When this happens piles of mail will then be shipped to other offices to handle this – without logging your documents in any way. Rough guess is this will add a week to them logging it, obviously more if you’re unlucky enough for it to happen twice.
None of their staff will tell you this either and I don’t know why. I wouldn’t of spent £70 replacing documents had I known earlier.