King Haakon VII, known privately as "Carl," formed close ties with the British monarchy after taking refuge in the U.K. during World War II. He befriended King George V and developed a warm relationship with the young Princess Elizabeth, even attending her 1947 wedding. Elizabeth reportedly called him "Uncle Charlie," and some observers have speculated that this friendship influenced the naming of her son.
Following King Harald’s passing, King Charles posted a heartfelt tribute and joined in marking the special bond between the two monarchies. Flags at major royal residences in the U.K. were also lowered in a sign of respect while the nations acknowledged their close ties.