Slightly more detailed timeline.
Passport office: Durham
Application: Online
Passport printed and sent 1 July 2020
Application approved 29 June 2020
Application being processed 18 June 2020
Documents received 17 June 2020
Application received 12 June 2020
Identity details received 12 June 2020
Email sent to person confirming your identity 11 June 2020
Ask someone to confirm your identity 11 June 2020
Application submitted 11 June 2020
I was able to start tracking the package on the night of 1st of July with passport application number without spaces and three letters in front at this address: https://delivery.tnt.com/tracking
It gave me the delivery date: 03/07/2020 with the following scans gradually added:
01/07/2020 – Hub Unitised
03/07/2020 – Driver Collection
03/07/2020 – Driver Delivery
Once delivered, there is a picture of my door there too. It was put trough the door mail opening. Came in a passport sized white Home Office Envelope, which does not seem to have any of the tracking numbers from TNT of HO on it. Some other barcode and number.
Still waiting for the supporting documents to be returned. Passport is the new kind (very dark almost black blue).