My guess would be Mesembryanthemum (Livingstone Daisy). They close up when not in the sun.

Mine too...

Yes me too, looked at this earlier, but couldn't for the life of me remember the name, must be an age thing, ? Derek.

Well Derek, Mesembryanthemum doesn't exactly roll off the tongue does it? :o))

I had one last year called Delosperma Jewel of Desert which closed when the sun went down like a mesembryanthemum and it was also called an ice plant. The colour was amazing.

That sounds pretty special!

I think Cammomile has it. They look like an assortment of the newer Delosperma hybrids. Livingstone Daisies (Dorotheanthus bellidiformis) have similar flowers, but smaller leaves covered with sparkly blisters--the origin of the common name "Ice Plant".

Cammomile is spot on! It's Delosperma. Here, we also call them ice plants - a succulent, perennial ground cover with daisy-like flowers. Mine never came back after a brutally nasty winter. I think they are for mild climates.

Mine didn't last the winter either.

Many Delosperma species are hardy to Zone 5, but the hybrids are a bit more tender.

They are used quite a bit in California as slope stabilizers & for erosion control

More often Lampranthus and Drosanthemum species used there, although Delospermas are also present, especially Delosperma x 'Alba'. The first two genera wouldn't survive a UK winter, though.