The wait time that's posted on the Embassy website is not for interviews, but how long it's taking them to process DCF I-130's.
There's no info on the embassy website about how long it takes to schedule interviews. But that's what VJ was invented for!!!

Going by recent interviewee' sigs on the interview thread
freecake:
16th July Case sent to London Embassy
31th July Received Pack 3 from London Embassy
1st August Sent pack 3 form
10th August had medical in London
16th August received police report
18th October Received packet 4
2nd November Approved at Interview
6th November VISA and MBE received
Paulinespens:
16th July Case sent to London Embassy
31th July Received Pack 3 from London Embassy
1st August Sent pack 3 form
10th August had medical in London
16th August received police report
18th October Received packet 4
2nd November Approved at Interview
6th November VISA and MBE received