Well, so far I've heard back from Jon Evans , Neil Tyers, Sarah Macrae and Val Wooley!
Val Wooley, who was a seller of the plant some time ago, has replied saying:
"Good morning Maggi
Neil Tyers has forwarded your enquiry to me. The George Harrison plant has always been a subject of interest on the nursery (now closed) as everybody assumed it was named after the well-known Beatle! In reality it was named after a gentleman called George Harrison who had a nursery in the North East of England. I have never known any more about the nursery but perhaps you could ask John Richards or Jim Jermyn.
Many years ago Ringo Starr’s gardener contacted me as he wanted to purchase some plants of George Harrison’ for a Beatle themed border. I spent some time going through the Plant Finder for him and found several other appropriate plants with names such as’ Abbey Road’. There were no primulas however.
Sorry this is all the information I have but I hope it helps. If you find out any more I would love to hear from you.
Best wishes
Val Woolley"
Many thanks to all these nice people who have tried to help!
Val sent this photo of the plant :
And Sarah Macrae tells me that Ardfearn Nursery is listing the plant once more.
www.ardfearn-nursery.co.uk
