F6 relevant book version and finance act queries.

Hi tutor.

I would like to ask that I will be sitting for paper f6 this December therefore;

1. Which book shall I use means which year version?

2. Since I will be sitting at dec 2015 therefore is OT lectures updated or I have to wait. I am aware that course notes are updated but I am asking specifically about video lectures.

3. What is U.K fiscal budget year ( finance year) ? If I am not wrong it is from April to march.

4. After passing of budget from parliament especially referring to tax when does Acca make the same applicable to be tested like after new fiscal budget after how many months Acca will incorporate the changes in to syllabus.

P.s I am student based outside of U.K but I will be taking U.K variant.