The main change is that Military calibres that were classed a Cat:1 ( restricted and controlled) have now been changed to Cat 5 - or to be exact, Class C ( just need to register ownership).
All the categories that were last revised on May 6th 1995 have now been changed to new ones as of July 30th 2013 but have only recently been published. I need to do some translating work but as a 'for instance';
British .303 was a restricted category but .303 Sporting wasn't. Now ownership of a Lee-Enfield in .303 British is not restricted, you only have to notify the authorities of ownership. That goes for other military calibres too so 7.62 is easy to buy and shoot.
Must have a look round for an SLR



