Hmm, need to narrow the field a bit or I'll be typing a list the equivalent of an encylopaedia, lol! Is it for going against a fence or wall, how tall and wide do you want it to be? And which part of the UK are you in?

Thanks awfully for responding.
The space btw the pyro and wist is a corner brick wall approx 5' high, very sunny. Had a beautiful ceonothus but as they only last about 10 years, would like something more permanent. Flower/colour essential ; scent a bonus ; bee/butterfly friendly but not a buddleja (too scrappy). Max height 6' though am happy to prune to restrain growth. Soil is alkaline. Small London gdn.
Most importantly is to get the colour right. Pyro is redberried and then white flowered, wist is purple, hence the deep blue choice of ceonothus.
Has the encyclopaedia become a pamphlet yet? Looking forward to your reply and thanks again.

Weigela middendorffiana (deciduous, yellow foxglove like flowers in early summer, needs pruning immediately after flowering). Weigela aureovariegata, variegated leaves, rose pink flowers, Weigela follis purpureum, purple leaves, pink flowers, though this one is slow growing. Wouldn't recommend Weigela florida, its growth habit is too arching for such a situation. Otherwise, Berberis darwinii (orange flowers in spring, prickly, evergreen) or Escallonia Red Elf (be careful which other variety you choose of Escallonia, some of them get 12 feet). Ribes sanguinam (flowering currant) deciduous, early flowering, or the ubiquitous Forsythia are other options.

Thankyou Bamboo - you're a star! Will go thru my encyclopaedias and choose one of your suggestions. Bless You!