It isn't very clear but it looks like a Diascia.
I don't know if it's got an English name ...
They can be overwintered in a frost-free shed.

I think diascia, too. I have one the same colour and we have put it into the g'house in the hope it will come through the winter.

This was my Daughter in laws last years ,that survived outside to live This year

Some Diascia are actually fully hardy but without knowing which one it is difficult to say if this one is.