The Kingdom of Hereford was part of the Ununited Kingdoms, and the Kingdom where Jennifer Strange lived and most of the Chronicles of Kazam are set.
It was ruled by King Snodd IV and his wife Queen Mimosa. It was unique among the Ununited Kingdoms in that it based the eligibility to take a driving test on maturity rather than age, which is why Jennifer Strange could drive from age thirteen while many men in their forties still struggled.