This flower is growing in a South East London, England, garden, totally uncared for but flourishing. Any I.D. most welcome please.
It is a Hellebore...Helleborus. Looks like Helleborus argutifolius. https://www.rhs.org.uk/plants/8565/helleborus-argutifolius/details
Thank you for your ID. I should have recognised this plant as a hellebore but it was so much bigger than those I have in my garden I did not make the connection. Thank you again for your help. Regards Richard Masson