VCR's had their own tuner.
You will be best advised to get a PVR or DVD/HardDrive with a digital tuner built in so that you can record one digital programme while watching another on the TV.
The aerial will loop through the recording device and into the TV and the two will also be connected by a scart cable or similar.
Panasonic and Sony make good DVD/HD recorders and Humax are noted for their PVRs.
Note that PVRs only record TV programmes onto a hard drive with no other inputs I believe. The DVD recorders are more versatile.