Some kind of cranesbill I think. I revisited the wildflower patch I visited on 13th June, but not a lot had changed. I don't like the composition here, I chose this mainly for the colours. I didn't take any nice photos today!
@tristansmum Yes, cranesbills are geraniums, it's just a common name for them I think, for example meadow cranesbill is Geranium pratense - though this isn't meadow cranesbill, I haven't figured out which kind this one is!