just to clarify, this site is not "owned/controlled" by NTL
for the OP - there is no way a freeview box will tune in any programs from the output of cable decoder. You
may be able to pick up some 'free to air' channels off the cable with the jerrold box, but only if the cable is actually connected to the street cabinet - and as has been pointed out, the legality of this is dubious