Hi Ania, as alterhase58 said the times quoted by the Home Office is a standard answer.
I applied for citizenship on 10/07/18 and received a letter of approval dated 31/08/18 on 07/09/18, I organised a private ceremony and completed everything on 12/09/18. So just over two calender months.
The folowing is the draft law if you have not seen it,
https://www.auswaertiges-amt.de/de/auss ... tz/2119360. worth a read.
Of course all bets will be off if there is no agreement on Brexit with the EU, what happens then is still up in the air for almost everything including EU citizens.
On my recent experience you still have time but that could run out if you delay, but nothing is guaranteed so best of luck whatever option you take.