Umm WOW, Being an aussie with a love for .303s. What are the details of you three??
The bottom one is a Canadian Long branch No4, late WWII
The one above it is also a Long Branch No dated 1949
The third one up is one of the No4 Unissued and unfired ones found in a warehouse in Ireland a few years ago. It is dated 1955
The forth one up is an Australian Lithgow No1 WWII dated
The Fifth one up is an Indian Ishapore in .308
I have one more that is not in the picture. It is also an Ishapore, but is the grenade launcher model with the wire wrapped stock and a launcher cup on the muzzle