Looks like a thunbergia to me in which case it's a tender perennial, usually grown as an annual. You can keep it cut back to that support or let it wander as it likes. The first frosts will knock it back.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
Posts
https://www.mr-fothergills.co.uk/Flower-Plants/Plants-for-Hanging-Baskets/Thunbergia-Sunny-Suzy-Pink-Beauty-Flower-Plants.html#.Xw7LZOzTU1J
I think Chiltern Seeds also do a white version.
Thunbergia alata "Sunny Susy Rose Sensation."
https://www.selectseeds.com/annual-vines/black-eyed_susan_vine_rose_sensation_plants.aspx