"cost saving of..5 and 8 hours of truck and driver's costs on each trip with 'Open Borders'."
Multiplied by the more highly distributed supply chains driven by JIT mfg and distribution over the last 42 years of EEC/EU membership.
Example.
Most European Avon beauty products come from a gigantic factory/warehouse site in Poland.
Consider how many borders they will come through to get to the UK.
The best observation Brexit I've seen is this.
Leave campaign bus "An extra £350m/week into the NHS" (this was admitted as BS within days but left on the side of the bus anyway)
HMG last week "We are asking the food and drug industries to substantially increase their stockpiles to cope with delays in the supply chain."
I predict the number of people who will admit to voting Leave within 2 years of the actual event (which hasn't happened yet) will be about the same as the number of people on VE Day 1945 who admitted they voted for Oswald Mosely before WWII. IE approximately f**k all.