ID please
I was delighted to see how my local council had created mini flower meadows made up of a mixture of wild flowers and garden annuals. The overall effect is delightful, but could someone ID this pink flower for me, as this is a planting scheme I intend to use in my own garden next year. Thank you.

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https://www.burncoose.co.uk/site/plants.cfm?pl_id=3166
More attractive versions are available and just as good for pollinators, eg
https://www.rhs.org.uk/Plants/100515/Persicaria-amplexicaulis/Details which has several forms with different shades of red flowers
or this one which is shorter and can be evergreen in a mild winter, makes very good ground cover and its leaves go red in autumn
https://www.gardenersworld.com/plants/persicaria-affinis/
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
Edited to say: bistort is perennial, but it looks to me as if the majority of flowers in the photo are annuals, so you'd need to re-seed each year (or make sure the flowers ran to seed and sowed themselves).