noblegiraffe
KCC's Guidance Note for Schools document you linked to was written towards the end of 2018 - prior to the increased contingency planning for a no-deal scenario.
And we all know that local authority employees in the education department can be a little "over dramatic" (Headteacher has to clean the school toilets herself etc) 
From the documents I linked to (21st March and 29th March) - the Freight Traffic Management Plan was only devised in December, Operational Fennel was completed in January, and the Simplified Import Procedures announced in February.
KCC 21st March:
"KCC welcomes the Government’s recent guidance on their requirements for Roll-on Roll-off (RoRo) movements entering or leaving the UK for the period following EU exit.This aims to ensure traffic can continue to flow and provides more time to businesses to prepare for changes to EU-UK trade."
"3.5 The Transitional Simplified Procedures (TSP) would only become operational in the event of a no-deal scenario.Once businesses are registered for TSP, they will be able to transport goods from the EU into the UK without having to make a full customs declaration at the border and will be able to postpone paying any import duties."
"This will provide for Business as Usual (BAU) for one year, after which a new custom procedure will come into operation, giving businesses time to prepare for import processes."
" It is anticipated that the Council’s decision-making processes will be used to allocate Government monies for 2018/19 in a timely manner and ensure Kent benefits from available no-deal preparation funding."
No doubt there will be some disruption in a no-deal scenario - but we will cope.
I am surprised to see that you've joined the body bag brigade Noble - I thought you were more sensible than that.