The Birds of Britain range was launched in 1977. The illustrations are from The Natural History of Britain by Edward Donovan, 1794.This is the small teapot with six cups:

On the tea pot is the Bullfinch, the cups have the Redpoll, the Goldfinch, the Blue Tit, the Redstart, the Robin and the Willow Warbler.  Here is the same set seen from the other side:

On the tea pot the Nightingale, on the cups the Linnet, the Greenfinch, the Bearded Tit, the Sedge Warbler, the Great Tit and the Marsh Tit. The larger cups have the same birds:

The bird on the tea pot is the Hoopoo. The Roller is on the other side ot the teapot:

A sugar and cream set completes the teasets. You can see the Tree Creeper, the Willow Warbler and the Goldcrest on the sugarbowls. The jug has the Bearded Tit and the Blue Tit.

There is a set of very small mocha cups:

Birds of Britain also has a beautiful jug and bowl set, with the Harlequin Duck: