Returning to Spain after Oct 31st
Something many will probably not have given much thought to is the potential, if not likely, limitation which will be placed on the value of goods brought back to Spain after a visit to UK without having to pay import tax.
Although the document in the link below link refers to France I think it can be taken as a reasonable indication of what might apply to Spain. Of course if crossing to one of the channel ports and landing in France to drive all the way as the point of entry to the EU the document will apply directly.
Note that this applies to ALL items of value which you might be carrying where you may be asked to prove when and where you bought them or be charged import duty, the reverse might apply when entering UK.
There are implications in other fields too such as importing a car for instance where VAT could be demanded even though it's already been paid in UK.
There is no reason either why the limits on the import of alcohol and tobacco to UK for personal consumption would not default to the same as any from other country in the world which will mean the demise of the popular UK 'booze cruise'.
None of this of course will be of any concern whatsoever to leave voters who I'm sure will have carefully and thouroughly weighed up each and every consequence before placing their mark in the box!
A bit of wild speculation here but I wonder if UK did fall into a post Brexit recession could the government impose currency controls, remember the 70's 50 quid limit !!!