Hi
I have a subscription with Ancestry and recently emailed them asking about the 1911 census and any increased subscription charges. This is the reply they sent:
We appreciate your message.
Ancestry is committed to launching new historical record collections online for our members, and also selected collections perhaps already available elsewhere which our members have expressed a strong interest in accessing on our site. In the coming months, our current plan is to launch onsite the 1911 Census Enumerator Books, which we are confident will be of terrific use to members, helping them to cross-track their ancestors through censuses, telephone book, military records etc during the early part of the 20th century. However, we do not currently have an estimated date for the release of the complete 1911 UK Census.
If there is anything else with which we might assist you, please let us know.
Note they do not answer the charges query.
Margaret