Hi tom.kelly1942 and welcome to CD Freaks :).
You probably need to connect the DVD recorder to the Virgin box with a fully-wired SCART lead. Recording of the Virgin cable reception programmes can be made to this 'external input' of the Panasonic.
The aerial connection is to receive Freeview TV transmissions and should go to your roof-top aerial (or room aerial). You'll need to switch the recording source to the built-in tuner - rather than the SCART external input - if you want to record anything on the Freeview channels.