Red deer red deer was the most prestigious quarry, especially the mature stag, which in England was called a hart. Red deer are held in captivity for a variety of reasons. The meat of the deer, called venison, was until recently restricted in the United Kingdom to those with connections to the aristocratic or poaching communities, and a licence was needed to sell it legally, but it is now widely available in supermarkets, especially in the autumn. The Queen still follows the custom of offering large pieces of venison to members of the Cabinet of the United Kingdom and others. Some estates
Red deer of these populations have been supplemented with deliberate releases of deer from parks, such as Warnham or Woburn Abbey, in an attempt to increase antler sizes and body weights. The University of Edinburgh found that, in Scotland, there has been extensive hybridisation with the closely related sika deer. Several other populations have originated either with "carted" deer kept for stag hunts being left out at the end of the hunt, escapes from deer farms, or deliberate releases. Carted deer were kept by stag hunts with no wild red deer in the locality and were normally recaptured after the hunt and