* UK planning documents outlines risks of no-deal Brexit
* Cross-Channel ports severely hit for up to three months
* Deliveries of food, medicine and fuel could be affected
* Govt refuses to publish advice on suspending parliament(Adds block on releasing documents on suspending parliament,Labour response)
By Paul Sandle
LONDON, Sept 11 (Reuters) - The British government's plansfor a no-deal Brexit warn of severe disruption to cross-Channelroutes, affecting the supply of medicines and certain types offresh foods, and say that protests and counter-protests willtake place across the country, accompanied by a possible rise inpublic disorder.
The "Operation Yellowhammer" worst-case assumptionspublished on Wednesday were prepared on Aug. 2, the governmentsaid, nine days after Boris Johnson became prime minister, andform the basis of its no-deal planning.
The document, which looks at the worst that could happen ifBritain leaves the European Union on Oct. 31 without a deal,said public and business readiness for such an outcome wouldlikely be low, in part because of continued political confusionin the run-up to Brexit day.
It said lorries could have to wait up to two and a half daysto cross the English Channel and British citizens could besubject to increased immigration checks at EU border posts.
"Certain types of fresh food supply will decrease," it said."There is a risk that panic buying will cause or exacerbate foodsupply disruption."
It said the flow of traffic across the English channel couldbe reduced by as much as 60% on the first day after a no-dealBrexit. The worst disruption could last for up to three months.
Traffic queues could affect fuel deliveries, disruptingsupplies in London and south-east England, and panic buyingcould cause shortages in other parts of the country, it said.
Cross-border financial services would be affected as wouldinformation-sharing between police and security services,according to the document.
Documents from Operation Yellowhammer were first publishedin the Sunday Times newspaper on Aug. 18.
Michael Gove, the minister in charge of coordinating"no-deal" preparations, said then that the document was old anddid not reflect current levels of preparedness.
He said on Wednesday that assumptions contained in thefive-page published document were currently being reviewed, butthey were the most recent complete iteration of the plans.
The opposition Labour Party said the document confirmed thesevere risks of a no-deal Brexit.
"It is completely irresponsible for the government to havetried to ignore these stark warnings and prevent the public fromseeing the evidence," said Labour's Brexit spokesman KeirStarmer.
"Boris Johnson must now admit that he has been dishonestwith the British people about the consequence of a No DealBrexit."
In releasing the document, Gove was acceding to a requestfrom lawmakers. But he refused to make public the advice ofgovernment advisers about Johnson's decision to prorogue, orsuspend, parliament from Monday until Oct. 14.
Scotland's highest court of appeal ruled that decision wasunlawful on Wednesday, prompting calls for lawmakers to returnto work.
Gove said the publication of advice given to ministers wouldbe an "inappropriate and disproportionate" use of parliamentaryprocedure, and the individuals would have no right to reply.(Reporting by Paul SandleEditing by Sonya Hepinstall)