Tier 1 Dependent extension -documents help

Hello,
My dependent visa ( Tier 1 general dependent) is expiring at the end of sep.
Could you please suggest list of documents we need to provide?
Also, I need a appointment at Croydon branch in Sep. Anyone knows how easy/difficult are appoinmtnet these days?

Many thanks!

Appointments are easy, you book and pay online.

Read through the tier 1 dep guidance notes, has lots of info in.

many thanks for prompt reply.

I started the dependent application. I am confused about health surcharge. My husband has ILR (after 5 years as Tier 1 general).

Should I choose - apply alone or applying to join ?

thanks

You must apply alone otherwise the surcharge will bensure high and incorrect.

Many thanks!
One more query - My husband's british citizenship application has been approved (15 June 2016). He will take oath on 6 Aug.
I am wondering whether I will be considered as "family member of UK citizen" and will be exempt of surcharge? My son (minor) is also British passport holder.

There is only ONE visa category that is exempt from the aurcharge and that is Tier 2 ICT main and dependent.

Even spouse of BC has to pay surcharge if applying in that category.