Further to Romko's post:
If you only want to record programmes while you're out of the house (rather than recording one programme while watching another), you won't need any additional equipment.
To record a digital programme while you're away from the set, connect a Scart lead from the TV's output to the VCR's input. Leave the TV turned on, and tuned to the required channel. Set the VCR to record from 'AV' (rather than from any numbered channel) at the correct time.
If you want to record one programme while watching another, you'll need to add another digital tuner to your system. As Romko suggests, it's possible to use a set-top Freeview box for the purpose, feeding the output from the box to the VCR's input. (Once again, you'll need to set the VCR to record from 'AV' while leaving the set-top box switched on and tuned to the channel you want to record).
Ideally though, you need to upgrade to a recording device with its own digital tuner. It makes things a great deal simpler!
Chris