You're welcome, Bunty. I've a few revisions after thinking a bit more. Viburnum will grow too large, so maybe not a good idea. Periwinkle is an evergreen shade-lover and gives beautiful flowers in spring. I prefer perennials when it comes to summer planting as they are such good value compared to annuals. Delphiniums (watch for slugs), Lupins, Aquilegias, Hollyhocks, Red Hot Pokers and Liatris are all favourites for a country garden. Roses, too, if you have the space.