Re: A Cunning Plan
Prestel is what kicked off the Computer Misuse act 1990: or rather it was the fact that someone accessed Prince Philips Prestel mailbox, and at the time they could only be charged under the Forgery and Counterfeiting Act - which was appealed, and the Crown lost(!). The very public lack of suitable legislation meant the Computer Misuse Act came into being.
Details in the Wikipedia article Computer Misuse Act 1990