Convulvulus aka Greater Bindweed, Hedge Bindweed, Bellbine and many other names … pretty, but regarded as a weed in most gardens as it quickly becomes rampant and swamps other plants.
I don't think it is the big bindweed, the leaves aren't right and the flowers are smaller. I think it is Convolvulus Arvensis or field bindweed, which has smaller flowers. They can be pink or white.
Dordogne and Norfolk. Clay in Dordogne, sandy in Norfolk.
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Not a desirable specimen plant in most domestic gardens
I live in west central Scotland - not where that photo is...
https://www.rhs.org.uk/weeds/bindweed
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
In the sticks near Peterborough