General question on naturalization

[kirana]

Current circumstance:

Currently I'm on ILR and Now Am elgible to apply for Naturalization/Citizenship. I will be getting married in 1st week of Jan 2013 and then after wanted to apply for dependnt visa for my wife some time in January 2013.

Now my query:

Assuming that -
As per the standards the normal processing time for Citizenship is around 3 months (minimum) and So possibly I may get an approval letter by December 2012.
I must travel to India by 20th December. So I do not want to attend the ceremony immediately but surely will take up in 90 days.

At this point I will only have an APPROVAL letter of naturalization without Ceremony - In order to make an application for Wife's dependent VISA - on what grounds I need to provide/submit - i.e.
1. Will it be ILR dependent
or
2. Do I need to complete my Citizenship ceremony, British passport and then apply for dependent VISA?

I believe still I will be an ILR holder and have submit wife's based on ILR as I might have only Approval letter but not Naturalization certificate.

I'm bit confused in taking decision - Please advise what is the best way to go ahead.

[Jambo]

You are not British until you attend the ceremony.

In practice, British citizen spouse or ILR holder spouse is the same visa so it's just a matter of which nationality to write on the application form and which evidence to produce.