Does any one have any lists or info to identify the following on Data/Modification plates attached to Spitfires ?

1. Modification Numbers relating to the modification carried out.?

2. The Factory code, ie GAL, CBAF, FL, MU1 etc for the factories that carried out the modification work.?

3. Any data base for the production numbers stamped on the mod plates that correspond to the aircraft RAF serial numbers ?

Incidentally,  while I’m sure this has been answered else where,  as Ive seen the question a few times : correct me if Im wrong but,  the number 30064/325 stamped on the back of any Spitfire data plate is simply the data plates part number. It has nothing to do with any parts, work or RAF serial number.

regards

Jon