www.ukbutterflies.co.uk

Same old question. Is it Southern Small White, Small White or Green-veined White. Alas no underside photo. I suspect the latter. Photographed 21st July 2023 Forest of Dean.

I would agree with your hunch- Green-veined White.

I agree - green-veined white. Although male southern small whites do have irregular, even inwardly jagged apices, they are not broken into discrete triangles like this.

Guy

Thanks for the information. I will still keep looking for SSWs.