to Cable Forum, btw
ok - to answer your main question, you won't get a freeview box to see anything other than the unencrypted channels from your cable. The analogue/digital question is a red herring as both signals are present down the cable - just at different frequencies.
It is possible to split the cable before the stb & tune in the 'terrestrial' analogue channels (sometimes more - depends on the TV), but no encrypted ones - however as sollp has pointed out, there are potential problems doing this.
Sollp's advice about using a distribution amplifier to split the signal after it comes from the box is probably the easiest way - the obvious downside being you can only watch the same thing on both televisions.