Britain's animal rights campaigners swoop down on hunters of grouse and game

A shooting party on the moors in North Yorkshire, Britain. Photo: Owen Humphreys/PA Wire/dpa

A dog rushes across a heather moorland, driving a red grouse to flutter hastily into the air.A gunshot rings out and the bird falls dead to the ground. The dog trots back to the hunter, holding the prey in its mouth.

Britain's hunting season has just opened, though increasingly, campaigners are putting pressure on the practice.