The first is the War Medal 1939-1954, awarded to subjects of the British Commonwealth for at least 28 days of full service in the Armed Forces or Merchant Navy.

The second was awarded to subjects for 180 days of continuous operational service. They were authorized two "clasps" on them, and campaign stars as well. Awardees not directly from the British Isles would have their name on the back.

The third is the Defense Medal, awarded for anywhere for 90 to 1,080+ days of service in a non-operational role, so people working in an HQ section, behind the lines, Civil Defense or Home Guard, and the like. They were also authorized with campaign/service stars.

These are British and Commonwealth campaign medals, awarded to those who took part in certain campaigns or operations. All three of the ones you have here were awarded for service during WWII. The first medal, with the red, white and blue ribbon, is the War Medal 1939-45. This was awarded to any British or Commonwealth citizen who served for at least 28 days in any of the Armed Forces or the Merchant Navy between September 2nd 1939 and September 2nd 1945. The medal did not require service in a war zone. It could also be awarded to foreigners serving with the British armed forces whose governments did not issue equivalent awards. The second medal, with the dark blue, red and light blue ribbon, is the 1939-45 Star. This was again awarded to members of the British armed forces and Merchant Navy during WWII. For this medal, 180 days of service in an active operational command was required, though for aircrew and airborne troops, this requirement dropped to 60 days. There were also some cases where just one day's service was required; these were usually brief special operations like the raids on Dieppe and Saint Nazaire, or shorter campaigns like the Japanese invasion of Burma. The last medal, with the green, orange and black ribbon, is the Defence Medal. The requirements for this are complex. It was awarded to military personnel serving in non-operational roles; rear area headquarters, or on airfields and training bases. It could also be awarded to civilians serving in civil defence organisations, such as the police, fire brigade, or air raid wardens. To receive it, one had to spend 1,080 days on service in the UK, 360 days on non-operational military service in areas not threatened by attack, or 180 days non-operational service in areas threatened.

Hello there! As your question is related to looking for identification/information regarding military personnel, our Guide on Military Identification may be of use to you. It provides a number of different resources, including how to request service records from a number of national agencies around the world, as well as graphical aids to assist in deciphering rank, unit, and other forms of badges or insignia. While the users here may still be able to lend you more assistance, hopefully this will provide a good place to start!