Switzerland isn't in the EU. This isn't an EU centered protest.
D, A and CH blockade will take out any East European supply. Very few fast East-West corridors available. Will cause disenchantment from the east bloc wrt to the EU. 3 Seas Initiative is a good exit option, IMO.
Rotterdam/Antwerp corridor through mid-northern Germany (NL to D via Venlo) has never been closed,, even when all the D borders were closed during the height of the lockdowns.
I think a lot of the UK transport issues are from the UK Covid tracking app. Foreign drivers don't want any part of that shit. Just flew out of the UK to Central Europe. News hit late Friday afternoon and the gas lines started immediately after the first reports.
Boris says plenty of oil, but I think that would be best determined by tanker activity. They'd be anchored off the coast waiting for filled tanks to empty. More likely is a scenario where oil futures are going to skyrocket and shipping companies want to hold on deliveries until the price rises, I think.
Only way to stop the bullshit now is to cut off supply so people demand the government be thrown out. Elections fucked, courts fucked, no other option.
US truckers may have to step up and follow Central Europe.