Lesley, thank you for sharing this awesome picture of UP Long and his Rangers. I think I found the cap badge, and I believe you are correct. The King's Regiment was originally founded in 1685 in Liverpool, and after 273 it was amalgamated in 1958 to form the King's Regiment (Liverpool and Manchester) which was combined with the King's Own Royal Border Regiment and the Queen's Lancashire Regiment to form the present Duke of Lancaster's Regiment (King's, Lancashire and Border).
I searched for UP Long and his Rangers, but to my avail, was unable to find anything.
This is an excellent picture, though. It reminds me of the pictures I have seen of my uncles and my dad in WWI & II and the Korean War.
The picture is very clean, you can even see the bottom of their boots clearly. The buttons on their uniforms are clean and the creases are crisp.
Four of the five guys are smoking - and usually you would see some dirt or clouding in a picture this old - but I see nothing.
Sorry I can't help you with the names, though I did try searching, but I thank you for sharing this picture with your WikiTree family.
God bless you - and Merry Christmas!