I was reading about the Mexican police finding US$223 million in a house in Mexico.
Just as an exercise in ingenuity, lets say you were in a guesthouse in Mexico and found a smaller amount, say US$1,000,000 behind the wardrobe, the previous occupent's drug deal having gone wrong.
How would you get that cash into the UK?
My thoughts: Fly back: but airport scanners can apparently detect bundles of cash. Probably hard to disguise. Open account in Mexico? Hard to deposit that much cash. Would be difficult to transfer. Hire car and drive to US, hope to get through customs. Easier to launder that much cash in the US? Buy gold? Would need to split over many gold-dealers. Same risk of gold being deteced in bag.
My best option: sail with the cash to the UK. That way there would be no scanners to deal with? Only hope that the UK customs don't open the bag?