Skimmia, sarcococca, dwarf Lonicera, azalea, dwarf buddleia all spring to mind.

Thank you Seaburngirl. I'll keep these in mind when Spring is here. Best regards.

Acers are also happy in shade.

I love acers so will try a miniature one. Thank you Sheilabub.

My Pieris is growing happily in the shade & flowers well every year. There is P japonica & P floribunda to choose from.

Just a warning:
You need to be careful with dwarf Buddleia as I and a few other people I know have bought them - only to find they have grown into full sized trees! Mine is currently over 6 foot now and soon to be chopped down to near ground level as it will be far too big for my small garden.