If your vehicle was registered in 1994 or after you insurance group will have changed. Ie a group 3 may well now be a group 9 with a prefix letter etc. This is because there are now 50 insurance groups rather than 20. this came into force on the 01st Jan 2010 and is based on information collected since 1994. It has taken 3 years to study and set up. How this will effect premuims I do not know yet