Finally got my good news just minutes ago that my passport has been approved. It was a renewal sent to Peterborough on the 28th March, processing since 7th April and with numerous chases and escalations and written proof I needed it for government work purposes.
It was an adult renewal with change of surname due to marriage. Anything that isn’t a standard renewal and requires manual intervention and assessment (such as a name change) is still subject to delays.
Good luck everyone!