I would say not authentic but hang on for others to weigh in
Would have to see a much clearer pic. Looks like the pen failed in parts. There has been a considerable amount of very convincing looking dedicated/inscribed forgeries out of the UK in the past couple of years, so it has become much more difficult giving a green light to stuff at a glance, with a poor quality image. Sorry I am of limited help here. I used to believe I could not be tricked by forgeries, but that changed 2 years ago.
I am not sure about the loop from the J into the K. Also, the transition of the K into the R but perhaps that is the “pen failure”. The “wling” looks pretty good though.
Thank you Gents.
have gone for it so will send a better photo presently.
Thankyou for the feedback and expertise.