Wildflower meadow species for clay soil

[JemimaTiggywinkle]

I’ve decided to turn a strip of lawn into a wildflower meadow. Native species only (UK).

I’ve heard yellow rattle is fairly essential for making sure the grass isn’t too dominant.
What other species would you recommend for clay soil? Or can you recommend a good seed mix?

Bonus points for plants that won’t be too tall - ideally no more than 60/70cm.

In my clay I have ox eye daisies, scabious, vetch , campions, forget me nots, buttercups, salad burnet, hawkbit, clover, creeping jenny, speedwell, plantains, self heal, Bugle and yarrow.

Clay here. We have buttercup, daisy, forget me not, clover, bee orchids, speedwell, common self heal that I can name off the top of my head. But that's just of it's own creation. 😁

Meadow cranesbill, black knapweed. If reasonably damp, lady smock devils bit scabious, and maybe even ragged robin.

I have bush vetch, common vetch, field buttercup, creeping buttercup, red clover, red campion, white campion, lady smock, meadow cranesbill, greater burnet, meadow vetchling, birds foot trefoil, primrose, cowslip, snakeshead fritillary, wild daffodil. In the bits where I mow a path, white clover, daisies, self heal, field woodrush, forgetmenot, germander speedwell.

You are right to be considering individual species. most “wildflower” seed mixes are largely annual plants which used to be weeds of corn fields - cornflower, corncockle, corn marigold, poppy etc. they won’t persist in grassland, and need the soil turning over every year. A meadow by definition has grass.

Sounds like you all have lovely meadows.
I love scabious and ragged robin, and I’ll look up the other species mentioned, thank you.