Help with application time line

Dear All

Wondering if you were able to help me out with a quick question. I would like to find out what the earliest date is I could apply for naturalisation as a British citizen.

I am an EU citizen who applied for the PR card last year relying on the period 28 September 2009 and 30 November 2014 (this is the date when handed in the application). I received the PR card a few weeks later with an issue date of 11 December 2014.

Browsing through some paperwork I realised that I held a EU EHIC card from 29 July 2009 and could have applied for a PR from that date onwards on the basis of self-sufficiency but I only relied on the period when I started uni and was a student from 28 September 2009.

Hope this makes sense if not here's a neater timeline

29 July 2009 - issue date of EU EHIC
28 Sep 2009 - period included in PR application
30 Nov 2014
11 Dec 2014 - issue date of PR card

I would be keen to apply for citizenship as soon as possible but I'm uncertain about whether the issue date of the PR card or the dates included in the PR application are relevant when it comes to the 5 + 1 (Exercising EU rights and 1 year residency).

I wonder if I was able to apply for citizenship as early as 30 July relying on the following

29 July 2009 - 27 Sep 2009 self-sufficiency
28 Sep 2009 - 29 July 2014 PR card
29 July 2014 - 29 July 2015 Residency

Thank you very much for your time and your kind help in advance.