~pansies ivy cyclamen to provide brightness as it gets colder!

Not sure what grows in your climate/ but here in the U.S.: Coleus can be very pretty in a hanging basket. You could plant different colored ones in the same pot if you want a variety. As the weather gets colder, you can bring inside, they make great house plants. Just hang the pot in a sunny window!

Coleus is a summer bedding plant in the UK

And not a silly question. Snowdrops and early crocus could be good too.

A lot of on line suppliers are doing trailing pansies, mix with primulas, variagated ivy. Looks nice.

see below~
How To Make A Winter Hanging Basket. Video advice from Gardeners ...
A short video describing How To Make A Winter Hanging Basket, provided by Gardeners world and videoJug.
gardeners-world.net/videotest.asp?videoID=48 -
also fro mm RHS
Plants for winter baskets:
Buxus (Box), Cordyline, Crocus, Gaultheria, Iris reticulata cultivars, Hedera (ivy) – either variegated or plain, Carex (ornamental sedge), Primula (primulas and polyanthus), Cyclamen (small-flowered cyclamen), Viola (winter pansies and viola) and Erica carnea (winter-flowering heathers).
Plant winter hanging baskets between September and October, and it doesn’t matter if they are frosted as the plants are should be hardy.

hope this helps!