Thanks for the information.
If you were sold the DVD recorder on the basis that it's 'digital' (i.e. with an integral Freeview tuner), I'd go back to the shop and complain. I've just found it listed here:
http://www.laskys.com/tv_and_dvd/dvd/dvd_recor ders/philips_dvdr3480_05.html?cm_mmc=Pricegrab ber-_-Tv_And_Dvd-_-Dvd_Recorders-_-400599_PHIL IPS_DVDR3480%2F05&engine=pricegrabber&keyword= PHILIPS+DVDR3480%2F05
That page includes this as part of the description:
"Analogue tuner: incompatible with digital channels"
That means that the content of my original post remains valid. You've only got one digital tuner (in your TV), so you can only record by the method I've described and you won't be able to watch one programme while recording another. To do so, you
could purchase a Freeview box, to use as an 'add-on' to the recorder,
but things can get rather complicated with cabling and recording. (You'd still have to use the 'AV' technique I originally described but take the signal from the Freeview box instead of the TV).
To get back to the position you probably had with your TV and a VHS recorder, where you could easily record one programme while watching another, you really need to upgrade your recorder to one that includes a digital tuner. (The cheapest one in the current Argos catalogue is a Wharfedale model for �99.99).
Chris