What Are They?

I first came across these flowers growing in a lane during Lockdown. I noticed some growing in a nearby garden and so guessed they had self seeded. I picked two! I did the same last year but this time I have walked down the lane three times and have not been able to resist helping myself (there is a huge patch growing!)
Please could somebody tell me what they are? Blipper Maurice1948 could, I know. Thanks.