@caringcarer
you seem to think if we leave EU on WTO rules we will have no water. … The most common chemical for purifying water is salt. How do you think we got water before in EU? ....
Clumsy sentence construction on my part - while the UK might not run out of water, a shortage is very much possible. This is based on the issue of chemicals (not just salt) being delayed at the border, which will happen if border controls are introduced.
You state finished goods cannot be exported but on WTO rules we can export to any country and we can put 0 tarriffs on them.
Finished goods cannot be exported if their certifications (e.g. CE-mark) are no longer valid. They will be delayed if the ports clog up. The UK does not determine what tariffs are paid on UK exports - it is the importing country that sets the tariff.
There is a danger that France will deliberately delay UK goods at border but UK plans are to open up new shipping routes so less dependent on Calais.
Of course goods will be checked when entering the EU from a Third Country. Landing the goods at an alternative port (Dieppe, Zeebrugge, Esbjerg) doesn't alter this. Calais cannot actually accept any food products from the UK - it doesn't have the facilities to store and inspect agricultural goods, so these will need to go via Dunkirk, where the capacity is limited.
Why would you want to belong to club that is so vindictive to any country wanting to leave?
Brexiter discovers that once the UK leaves the EU and makes it's own rules, the EU insists that in the EU, EU rules apply.
We do import many drugs but we also export UK drugs to EU countries. UK has apparently been stock piling drugs we import and EU countries like Southern Ireland have too.
Stockpiling of drugs (and food and chemicals) is only a short-term solution. Once the stockpile has been used, unless normal levels of supply are reinstated, the goods run out. For drugs, this might be a matter of weeks. For food, it might be a matter of days if people panic-buy. Some things cannot easily be stockpiled - e.g. perishable medicines and isotopes that require special storage that is simply not available in the volume required.
Why can't we leave on WTO terms which is how many countries trade
Only one country trades under WTO terms (Mauritania). As Togaandsandals explains, there is no set of WTO terms sitting in a drawer somewhere that click into action on 30th March and replace the 750 Agreements that the UK currently has with the rest of the world, and which become invalid in the event of a no-deal Brexit.
Anyway - what is your question to the panel?