That silene is a corncockle and it looks right to me.
I agreed with Buttercupdays that it's Silene coeli-rosa, synonym Agrostemma coeli-rosa, a corncockle not common corncockle but a corncockle. Is that outdated now? It certainly was considered a corncockle at one time and still seems to have that synonym.
As requested by Papi Jo we have taken another picture of the flower which I had just watered very carefully - there are a few flowers, so we have taken it of a different one, you can see the slim pointy flower buds (not the big hairy poppy bud), which I hope will help in the identification. It is such a delicate flower I am sure that IF it rains the poor thing will be finished.
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In the sticks near Peterborough
In the sticks near Peterborough
In the sticks near Peterborough
In the sticks near Peterborough