Getting Polish passport for a Polish citizen after approval in UK. What documents need to be filled?

I have lived in UK for 3 years on Visa.
Now I finally got all the documents that approved I am a Polish citizen.
I want to start the process, here in London, to get a Polish (EU) passport.
Does anyone have an experience with the embassy of Poland in London?
Should I set an appointment? Can I fill the needed documents in English (I read that it should be done only in Polish)?
Will I need also PESEL?

Any help will be appreciated.
Thanks

Richard, you are not yet a Polish citizen ;)
Call the embassy, they will tell you exactly about all the requirements to get a polish passport.
Where are you from? Who from your family was a Polish citizen(the closest relatives)? I'm asking because if they left Poland i.e. in XIX century then it might be a problem to get Polish citizenship since Poland was partitioned and there was no such political state on the map of Europe.

P.S. Having a Polish passport may not help you prolong your stay in the UK since they are leaving the EU... If this is your reason to get this citizenship