Ground Plants:

Campanulas - Beautiful blue flowers
Vinca Minor - Can be grown in Semi-shade
Geraniums - Ideal for dry soil
Japanese Anemones
Forget Me Nots - Self Seed everywhere, beautiful blue flowers
Hollyhocks


Shrubs:

Acer Palmatum
Choisya Ternata 'Sundance'
Camelia Japonica
Hydrangea Maniculata
Aucuba Japonica - Spotted Laurel
Hebe Pinguifolia
Azaleas and Rhodedendrons
Pieris Japonica


Climbers:

Tracheolospermum - Star Jasmine
Clematis Montana - Queen of the Climbers
Clematis Armandii - Evergreen Climber
Lonicera - Honey Suckle
Hydrangea Petularia - Shade Loving
Ivy - Instant coverage, but not for house walls.
Jasmin Nudiflorum - Winter Climber
Passoflora - Passion Flower


Trees:

Magnolia Grandiflori - Spectacular Evergreen
Betula Pendulum - Silver Birch