Lamiums of all sorts, Sarcococca varieties, Box, Ruscus - but all will need watering till established.

By the way, difficult to look at your photos, I had to open each one separately off site - the top one's upside down, the middle and bottom one are sideways on...

don't forget bulbs in the spring and then think about autumn crocus, cyclamen and colchicums. then there are ferns that are happy in dry shade to consider too. I also have pachysandra which is an ever green ground cover.

Mahonia repens or Brunnera are possibilities. Would Bergenia work?

There's a nursery on the 'net that specialises in shade-loving plants. I've used them myself and they're very good. www.plantsforshade.co.uk

Thanks everyone for your suggestions. Had a look a the website and will make a selection in spring when will ne planting new plants. Bulbs I will put in in the autumn. Have a feeling that the soil is quite poor in nutrients so wanted to dig in some rotted horse manure. Anything else I could do to improve the soil?

Bamboo and others -sorry about the pictures being all over the place- it's my IPad that's to blame!

Epimediums might be worth considering as well. I have some in a very unpromising dry shady spot.