Perhaps PITTOSPORUM tenuifolium
Take your pick on this site Eric:
http://www.burncoose.co.uk/site/offer.cfm?offer=1185I'd recommend a Clematis 'Nelly Moser' for that North facing wall.
Thats one plant (so Ive read) will hold its colours longer without fading when not facing direct sunlight.
Heres some of my favourites which may work in that shady spot:
Bergenia
Brunnera 'Hadspen Cream'
Brunnera macrophylla 'Jack Frost'
Fuchsia 'Genii' (this one almost glows in the dark!)
Acer shirasawanum 'Aureum' (also almost glows in the dark!)
Camellia (a couple in shade in my garden)
Primula vulgaris, Primula denticulata etc
Ajuga reptans 'Atropurpurea'
Then the spring beauties Daffodils, Crocus, Snowdrops
Hydrangea may do OK there, Eric. I read they can take shade so I planted a few under trees in my garden.
They do get a bit "leggy" in shade (as most plants do when they hunt for sunlight), but I have a deep blue variety and it did very well.