Hi,
I wanted to reply because I had a very similar situation with a child’s first passport (Bootle office). Here is my timeline:
Application history
StatusDate
Passport printed 2:08pm on 9 June 2022
Application approved 3:58pm on 8 June 2022
Documents received 11:58am on 10 May 2022
Application received 10:12am on 27 April 2022
Identity details received 10:10am on 27 April 2022
Email sent to person confirming your identity 9:53am on 27 April 2022
Ask someone to confirm your identity 9:48am on 27 April 2022
Application submitted 9:48am on 27 April 2022
On 26th of May I was emailed and asked for my own birth certificate. Fortunately I was at home and able to post that day. According to Royal Mail it was received on Friday 27th of May. I heard nothing until it was approved on Wednesday 8th of June and it was in my hand by yesterday lunchtime. Considering there were 2 bank holidays for the jubilee, I think this means you should get your passport in time. Additional documents are fast tracked. They don’t take as long as first time applications to be scanned. I’m therefore certain you will get your passport before your holiday.
Good luck.