QuickCheck: Are Great Britain and the UK one and the same?

A Union flag-themed umbrella covers a souvenir seller's stall opposite the Houses of Parliament in central London on July 13, 2022. - Britain's ruling Conservative party was Wednesday to winnow down the eight candidates vying to succeed Prime Minister Boris Johnson amid growing acrimony over alleged dirty tricks. (Photo by JUSTIN TALLIS / AFP)

THE terms Great Britain and United Kingdom (UK) are often used interchangeably.

But are they actually the same?