I did flowers for an event at the Garden Museum this week, and used lots of bright British daffodils and scented narcissi, combined with lovely yellow forsythia, pretty green guelder rose (Viburnum opulus), dramatic purple monkshood (Aconitum), purple limonium, blue hyacinths and British yellow tulips. I used British eucalyptus and viburnum tinus, and the gardeners at the museum gave me a big pile of foliage which would have gone to the compost heap had they not seen me on the hunt for extra foliage! They told me the name of it, and I've forgotten - Lavatera (tree mallow) maybe?
I remember monkshood from my flower identification exams at college - we had to learn which flowers and plants were poisonous or skin irritants. I wore gloves to handle the flowers, as I do with euphorbia (beautiful flowers, but horrible, irritating sap).
There were daffodils, limonium and guelder rose to brighten the cafe tables.
You can just about make out the model of the museum here - it will be closed at the end of the year to allow time for a major reworking, which will hopefully make it an ever better place to visit.