I saw these pot plants in our local garden centre and inspired by the prolific flowers wondered what they were. They are called the African Mallow Anisodontea capensis and I can see the resemblance.
According to the BBC site ‘The name might be unfamiliar, but this prolific South African plant has been grown for over a century in this country as a tender perennial pot plant. It flowers continuously through the summer into autumn, the hibiscus-like blooms varying in colour from light pink to deep magenta. The evergreen leaves are small and bright green. It needs to be overwintered under glass, but may survive winter outside in very mild, sheltered areas. May be propagated by seed in spring or by semi-ripe cuttings in late summer.’

I came across Anisodontea scabrosa, Anisodontea hypomadarum and Anisodontea capensis as varieties and I think it is a plant we will hear a lot more about as fashion and climate change impact. At the moment they are imported and I would prefer to see them grown in the UK before buying one for my own use.