James:
JN is absolutely right about TrueCrypt, it's an excellent tool. Be aware,
however, that you
can be compelled to disclose your encryption keys in the UK legally, and
you can always be compelled to do so via extra-legal means. If you have any
data that you truly wish to keep secret, a good start is to use
a second TrueCrypt volume containing important data inside the primary volume
which contains
data that is less crucial. Regards, - PH
