We are flying out in 6wks time & I only realised last Tuesday my passport had expired. So here is the timeline for using the standard passport renewal experience for me. Thankfully the online Passport application process sends updates, hence the accuracy of times & dates.
Applied online with my phone on Tuesday 3rd May 2022 16:51.
Ran to post office & sent old passport (Paid extra for signed delivery) to Bootle office 03/05/2022, 17:20.
Post office tracker sent confirmation of delivery Friday 06/05/2022.
Passport office acknowledged document received Sunday 12:47, 08/05/2022.
Passport approved 08:58 10/05/2022.
Passport printed 16:50 12/05/2022.
Passport delivered 14:00, 13/05/2022. VERY HAPPY!
Hope this is helpful to anyone renewing through Bootle.