One of the Senecios. Tamoides perhaps?

Thanks, floral.

I don't think S. tamoides, which is a vine/climber and leaves wrong shape, but looks affiliated, if that's correct.

Let us know if the gardener tells you.

It is Roldana aschenborniana according to the head gardener.

Goodness, never seen it before. But it seems it used to be considered a senecio.