I'm using (British) A4 labels, design L7760, on an HP Photosmart 2575.
Tony,
My version of Sure Thing shows a selection of stock from which one must choose the label stock he bought.
Maybe there's a different version of Sure thing for the UK which you have that shows L7760, but all of the choices I have (about 75) have company names and then stock numbers.
For example:Neato, Ace, Avery, with Avery 8695-2 UP; or Avery 8931- 2 UP and so on...........
You can see that Avery alone has at least 7 stock types with different numbers indicating the placement and spacing of the circular templates.
So, unfortunately, you will have to dig a little deeper for a more qualified paper match.
Alos mentioning that I show 2 selections on legal size sheets 8.5 x 14.
All the rest are 8.5 x 11. Double check the A4 selection to match the selections in Sure Thing.
Sorry to put you to such bother,
Fred