This
is the ICO Flowchart which is available at their website.

I do not accept it is the role of the ICO to train public
authorities how to deal with FOIA complaints. How much did this flow chart cost
the taxpayer? How much did the 48 page Vexatious Guidelines cost the taxpayers.

It appears to me the ICO is coaching these rogue public authorities how to body-swerve

https://ico.org.uk/media/for-organisations/documents/1167/flowchart_of_request_handling_under_foia.pdf