Cumbria County Council's decision to refuse planning permission for a radioactive waste dump in west Cumbria is the subject of a Public Inquiry this week.
A number of planning consultants and council officers will be presenting evidence at the Inquiry, which will be held over an expected two-week period at County Hall in Kendal.
The application to use the Keekle Head former open cast coal mine as a site to store up to aone million cubic metres of low-level waste was turned down in May 2012.
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The historic event always takes place on the last Friday in July.
Early enquiries suggest the men may have taken the drug Blue Valium. Two of them remain in hospital with breathing problems.
More than 8,000 people are expected to attend over the three day event, which starts at 7pm tonight.