Not on your nelly!

not on your nelly
British Certainly not:
Charlie shook his head vigorously. ‘Not on your nelly, mate.’
[originally as not on your Nelly Duff, rhyming slang for 'puff' (i.e. breath of life); modelled on the phrase not on your life]

It's definitely a Clementis and I believe it is a Nelly Moser although the petals are a darker colour to all other examples I have seen.
It is one of the most "gangliest" plants in the garden and just refuses to go anywhere.