Sorry don't have the answer but just wanted to say what a pretty flower

it is woody nightshade. a british native and the berries are bright red and poisonous. If you like it and have children you must teach them not to eat the berries that look like redcurrants when ripe. Failing that then you will have to dig it out. It is a member of the solanum family.

....and our only native member of the genus.

Thanks everyone for your answers .. we will be keeping it as we have no children with us .. Thanks once again John & Gillian