PRI is an internal military organisation, it stands for President of Regimental Institution, the institution collects funds and provides goods for sale etc. The list would have been put together by a soldier, so the fact that John has a different second name from the name on the Grave, and War records is not surprising. This list is important as very few records survive. I have a list of the 144 men who were missing wounded from the battalion in August 1944. The PRI roll, the issue of parachutes for OP Varsity in 1945, a record of all the officers and platoon sergeants for Normandy, Ardennes and Rhine drop, and all the men killed. Most of these were kept by my grandfather, except the PRI list, which was kept by another member of the battalion.

The Regimental museum has compiled a list from the Parachute course lists that survive, I have heard that most of the documents were destroyed in a flood at the museum; the other storey is that they were destroyed for fear of terrorist reprisals. Not certain which is true, but sadly very few records have survived. The war diaries are contained in the public records office. If you require more information try checking out The 6th Airborne in Normandy web site, which contains a large amount of information that you could only have previously obtained from Kew