I brought over £10,000 in cash and I was stopped at departures in UK. I thought "here we go, trouble ahead", instead they got me to empty all my stuff from hand luggage; loads of wires headphones chargers and devices and a brown envelope with the cash in. They just tossed the envelope with the cash in it to one side and then proceeded to go over my MP3 player and headphones with a wand thingy. They were not interested in the money, they just did a thorough check on my electrical stuff because by mistake I had not taken my laptop out of my hand luggage. In fact it was the teller at the bank when I was withdrawing it who was full of questions about what I was going to do with it. I told her anything other than leave it there with their lousy rates of interest.