It's easy to mix them up, so a refresher.
Lord Carrington was a politician who, despite some flaws, was a WW2 hero, a solid public servant, the man who implemented free elections in Zimbabwe after sorting out peace there when everyone thought it was impossible, a vastly respected diplomat, and the man who tried to prevent the Falklands War before it was a thing, in vain as Maggie wasn't listening.
Lord Cameron... is a cunt.
Hope that helps.