In photo order: Defence Medal, 1939-1945 War Medal, Italy Star (with Defence Medal ribbon), unkown Italian, France & Germany Star (with Italy Star ribbon) and 1939-1945 Star (with France & Germany Star ribbon).
Assuming the Italian medal can be worn, it will go last. You will need to find out where he went in the course of the war but many 8th Army (the "D-Day Dodgers") started in Italy and then went into Germany from the South. However seeing the para cap badge and not being au fait on para history, didn't the paras drop into Italy, and then Normandy?
So on the basis of my reasoning the order is:
1939-1945 Star, Italy Star, France & Germany Star, Defence Medal, War Medal and Italian unkown.
Hope this helps