Postdog's answer is perfectly correct but it doesn't actually tell you how to record using your current equipment.
Most TVs, with digital tuners, allow the signal to be fed to an external device. Assuming that yours does, you need to connect one end of a Scart lead to the 'out' socket on the TV. (If there's no designated 'out' socket, just try either of the two Scart sockets, or the sole Scart socket, as appropriate).
The other end of the Scart lead needs to go to the 'In' (or sole) socket on the recorder. To make a recording the TV must be switched on and displaying the correct channel. The recorder must be set to record from 'AV' (not from any numbered channel) at the appropriate time.
Points to note:
1. Because you've only got one digital tuner, you can't watch one channel while recording another.
2. Because your channel selection is via the TV, you won't be able to make unattended recordings of different channels. e.g. you could record a program on ITV3, while you were down the pub, but (unless you returned home to switch channels) you wouldn't be able to record a following programme on Dave.
3. I've referred to setting the recorder to 'AV'. Some manufacturers use other labels on their handsets, such as 'Line in', 'Line', 'L', 'L1', 'Ext' or 'Aux'.
Chris