Security ... think about it!
Britain has some of the most draconian security laws of the “free” world. Many of these laws are brought in under the guise of fighting terrorism and paedophiles (which are always guaranteed vote winners) and of course, if you’ve nothing to hide, you’ve nothing to worry about. Unless you’re an schizophrenic amateur scientist with a distrust of the authorities and you refuse to hand over the encryption keys (passwords) to your USB memory sticks. That’ll cost you an initial 13 months in jail followed by detention in a secure mental unit at Her Majesty’s pleasure.