Thank you for your apology Kay

I have, of course, examined the web site suggested by David and also carried oiut a Google search hoping to find an Iochroma which fits my plant.

Unortunately I am still without a specific name for this plant.

I agree with David that it is most probably an Iochroma but I would like a specific name. I really am surprised that no one has come up with this

Best wishes to you all from John Ketteringham MBE PhD of Lovely Lincoln in the UK.