It seems the whole "Agency" Visas regardless of the Visa type is now under scrutiny.
I use a very well known agency for my marriage visa and they do my 90 day reports for me, normally I get the 90 day report back within 2-3 days but this time it has been 2 weeks and still nothing. Whenever I enquire they say that they are sorry and there is a delay due to the Chinese Mafia story.
I'm onto 11 weeks of waiting now, I rang HMPO in Liverpool to track the progress and they said it hadn't been looked as of yet, so I think it's gonna be at least another 4 or 5 weeks.
I think there is a 7 day over time but even if it was more than 7 days you will just be fined (not sure how much but it's not big money) and it wouldn't effect you getting another Visa.