Hello! Cotoneaster frigidus cornubia, is a lovely multi-purpose small tree, with scented flowers, and red berries. Only deciduous in very harsh winter. Can be easily pruned to keep to size.

Magnolia Grandiflorus is a beautiful evergreen shrub/tree, I have one growing in a pot which I only planted last year and it is nearly up to 5ft already, it gets the most beautiful massive flowers on in August September.

Cotoneaster 'Cornubia' as a shrub or a small tree would be good. How about Cytisus battandieri, the Moroccan or Pineapple broom, silver-grey leaves with scented buttercup-yellow racemes, won't be seen in everybody's garden. If you fancy Magnolia grandiflora, then look for a dwarf variety otherwise it will end up being a beast.

Lovely idea, jimmytheone ...

How about a tree heather, Erica arborea? This has the usual heather type flowers but they have a beautiful scent and are very attractive to bees.

thanks to all who replied with suggestions, I will now look up these shrubs to see if they would suit.